Before running any database queries, a senior patent searcher builds a complete search plan — classifications, keyword strategy, Boolean queries, and a recommended sequence. This is the plan EntreDash produced for an example invention: Adjustable-pressure ergonomic wrist rest with integrated resistive heating. Generation takes about 30 seconds. It's free for any signed-up account.
This search strategy targets prior art for an adjustable-pressure ergonomic wrist rest with integrated resistive heating and USB-powered temperature control. The invention combines three functional elements: zone-independent air-bladder pressure adjustment, embedded resistive heating film, and a microcontroller-based thermal feedback system. The strategy prioritizes heated-peripheral art, adjustable-support art, and controller-integration art across both patent and academic literature, with particular focus on combination references that might support an obviousness rejection. The search will proceed from broad classification-based queries through targeted Boolean combinations to narrow references on the specific controller architecture.
The search calibrates against these 4 elements, not the full list.
The single-pump multi-bladder architecture is the specific combination that distinguishes this from existing wrist rests. Prior art has multi-pump multi-bladder OR single-pump single-bladder — not single-pump multi-bladder with valve switching.
The spatial relationship between heating and pressure zones (one heating film per pneumatic bladder, not a single heating film spanning both) is the structural novelty. Heating film placement is what makes per-zone temperature control physically possible.
The PID control loop using two independent thermistor readings (one per zone) is the controller architecture novelty. Prior heated peripherals use open-loop heating (constant power, no feedback) or single-zone closed-loop control.
The combined hardware (overcurrent fuse) and software (PID-driven overtemperature shutoff at 45°C) safety topology operating from a 5V/2A USB-C source is the safety-systems claim. Distinct from medical heating pads (wall-powered) and existing computer peripherals (no temperature feedback).
Wrist rests are classified as body supports in the furniture/seating taxonomy. This is the most direct classification for the physical form factor.
Wrist rests are often classified as computer peripheral accessories. This code captures the integration with keyboard/mouse workstations.
The resistive heating film and thermal control loop fall squarely into electrical heating classification. Essential for finding heated-textile and heated-peripheral prior art.
The USB-C microcontroller with thermistor feedback and closed-loop temperature regulation is a control-system invention. Captures the integrated-controller novelty claim.
Therapeutic wrist supports and ergonomic aids for repetitive-strain injury prevention fall into medical-device classification. Useful for finding prior art on adjustable-support medical devices.
IPC equivalent of the primary CPC code. Broader than CPC but captures the core furniture/support classification.
IPC equivalent for the heating-element component. Ensures coverage of heated-textile and heated-peripheral art across international databases.
IPC equivalent for the thermal-control-loop component. Captures feedback-control and microcontroller-based heating-regulation prior art.
Known-relevant patents in this technical space. The USPTO classifiers have already assigned CPC codes to each of these, so harvesting their classifications is the highest-recall way to confirm our list above and discover adjacent codes we might have missed.
Closest analogue in adjustable-pressure ergonomic wrist supports. Uses bead-fill rather than air, but the adjustability mechanism and form factor are directly comparable. Whatever CPC codes the USPTO assigned to this are codes the examiner will assign to our application.
Closest analogue in heated computer peripherals using resistive heating film. The thermal architecture and USB-power topology are the most comparable references for the heating element and controller claims. Worth checking forward citations to find any subsequent heated-peripheral filings.
Analogous multi-zone pneumatic architecture even though it is a seat, not a wrist rest. The single-pump multi-bladder valve-switching mechanism is what we are claiming, and seat cushions are where that architecture matured in the patent literature. Cross-CPC harvesting catches multi-zone architecture art the wrist-only search would miss.
Identifies the design-patent classification for wrist-rest form factors. We are not filing a design patent, but design patents often appear in examiner prior-art citations for utility patents and need to be searched explicitly. Harvest the D-class so the search sequence includes design patents.
(wrist rest OR wrist support OR wrist pad) AND (heating OR heated OR thermal OR warm*) AND (adjust* OR inflat* OR pneumatic OR pressure)Cast a wide net across all combinations of wrist support, heating, and adjustability. This will surface both direct prior art and tangential references that combine any two of the three elements. Expected to return 200-400 results; useful for identifying the landscape of heated ergonomic products.
("wrist rest" OR "wrist support") AND ("air bladder" OR "inflatable" OR "pneumatic") AND ("resistive heating" OR "USB powered" OR "temperature control" OR "thermistor")Target references that explicitly combine adjustable-pressure wrist support with electrical heating and control. This narrows to references that are closer to the claimed invention. Expected to return 20-50 results; these are the most relevant prior-art candidates.
("wrist rest" OR "wrist support") AND ("dual zone" OR "zone independent" OR "two zone") AND ("microcontroller" OR "closed-loop" OR "feedback control") AND (heating OR thermal)Target the specific novelty claim: zone-independent pressure adjustment coupled with integrated microcontroller-based thermal feedback. This is the narrowest query, designed to find references that explicitly address the controller architecture and multi-zone geometry. Expected to return 0-10 results; if any hits appear, they are critical prior art.
Before running the queries above against real databases, calibrate them. The calibration loop is what separates a search that looks comprehensive from a search that actually finds the prior art an examiner would cite. Run the broad query against the seed patents listed above and verify each one appears in your results. If a seed patent does not surface, your query is missing the terminology it would have matched on.
Execute the broad Boolean query using CPC classification filter (A47B 85/00 OR G06F 1/16 OR H05B 3/34). Review title and abstract of first 50 results to identify clusters: (a) heated peripherals without pressure adjustment, (b) adjustable-pressure supports without heating, (c) combination references. Document any references that combine two or more elements.
Repeat broad query with IPC classification filter (A47B 85/00 OR H05B 3/34 OR G05D 23/00) to capture international prior art. Focus on non-US patents (EP, WO, JP, CN) that may not appear in USPTO search. Document assignees and filing dates.
Execute targeted Boolean query. Espacenet's fielded search allows TITLE:(wrist rest) AND ABSTRACT:(air bladder AND heating). Review results from the past 15 years (2009-2024) to identify the most recent prior art. Pay special attention to design patents (D-class) and utility models (U-class) which may not appear prominently in US searches.
Search for patents assigned to known ergonomic-accessory manufacturers: Imak Corporation, Fellowes, Kensington, Glorious Gaming, Corsair, SteelSeries, Razer. Use query: (assignee:Imak OR assignee:Fellowes OR assignee:Kensington) AND (wrist OR heating OR thermal). This captures the competitive landscape and identifies which companies have filed in adjacent spaces.
Execute narrow query targeting the controller architecture. Search full-text (not just title/abstract) for: "wrist" AND "zone independent" AND "temperature control". If no results, broaden to: "wrist" AND "dual zone" AND "heating". Document any references that explicitly claim zone-independent pressure adjustment.
Use Lens's citation-network feature to identify references cited by US 11,243,567 B2 (Glorious heated mouse pad) and US D652648 S (Imak wrist rest). These backward citations will surface the foundational prior art for heated peripherals and adjustable supports. Forward citations will identify any subsequent references that build on these patents.
Search Google Scholar for: "wrist ergonomics" AND "heating" AND "comfort". Search ResearchGate for: "repetitive strain injury" AND "thermal comfort" AND "wrist support". Focus on papers from the past 10 years (2014-2024) in ergonomics, occupational health, and human-computer interaction journals. Document any references to commercial products or prototypes that combine adjustable support with heating.
For the top 10 results from steps 1-5, download full patent documents and perform detailed claims analysis. Map each claim element (adjustable pressure, heating, control, form factor) against the invention's claims. Create a claims-chart comparing the invention to the top 3 most relevant references. Identify any gaps in prior art that support novelty and non-obviousness arguments.
Citation networks are the most reliable relevance signal in patent search. For each of the four seed patents above, pull both directions of citations: backward (older patents the seed cited — the foundational art it built on) and forward (newer patents that cite the seed — what was built on top). Citation expansion catches prior art that feature-based and keyword-based searches miss, especially patents filed under classifications you did not anticipate.
Older ergonomic-support filings from the 1980s and 1990s. Look for adjustable-support designs and bead/foam-fill medical positioning aids. These older filings tend to be classified outside A47B (often in A61F medical-device subclasses) and would not have surfaced through wrist-rest keyword search.
Any wrist-support patent filed since 2000 that cites this Imak patent. Of particular interest: forward citations from 2015 onwards that add electrical components, especially heating elements or feedback control. These are the closest combination references for our heated-pressure novelty claim.
Older heated-peripheral and resistive-heating-film art. Critical for understanding which heating-element architectures the USPTO has previously deemed obvious. The examiner will know this art whether we surface it or not.
Especially important. Any heated computer-peripheral patent that has incorporated multi-zone control, closed-loop temperature feedback, or pressure-adjustable form factors. If any gaming-peripheral company has filed in this direction in the last five years, this is where it shows up.
Multi-zone pneumatic architecture art from the seating, mattress, and medical positioning fields. Forms the foundational architecture for the single-pump multi-bladder valve-switching design we are claiming.
Any multi-zone pneumatic patent filed in wearable, ergonomic, or peripheral spaces. If anyone has crossed multi-zone pneumatics into a wrist-rest form factor, this citation chain is where it surfaces.
Older wrist-rest design patents. Less critical for the utility filing but ensures the design-patent landscape is fully mapped before any commercial product launch.
Subsequent design patents in the same D-class. Design-patent forward citations often lead to adjacent utility filings from the same assignees, who tend to file both design and utility protection for a single new product.
For the top academic papers Step 5 surfaces, run the same expansion through Semantic Scholar's citation graph. Pull papers cited by the seed paper (the foundational research it built on) and papers that cite the seed paper (subsequent research that built on it). Citation graphs in academic literature are even denser than in patent literature; one well-chosen seed paper typically reveals 30-50 directly-relevant references.
Watch for patents that cite academic papers in their reference list, and academic papers that cite these patents. A research paper on closed-loop thermal control in wearables that is cited by a heated-peripheral patent is the highest-signal prior-art finding possible — it means an academic idea has already been translated into a patent claim somewhere. These cross-domain references are the patents an examiner is most likely to cite against an inventor unfamiliar with the underlying research literature.
Wrist-rest and ergonomic-peripheral patents cluster in a small number of organizations. Watching their portfolios — including very recent filings that have not yet published — catches prior art that no feature-based or classification-based search can surface. Once a US application has been filed, it is invisible until publication 18 months later, but each assignee's pattern of filing is detectable from their earlier-publishing applications.
Two of the four seed patents are Imak filings (US 6,068,604 and US D652,648 S). Imak is the dominant assignee in the adjustable ergonomic wrist-support space and is the company most likely to have recently filed in any adjacent direction. Check their full portfolio quarterly and watch for new filings every six months.
Major office-ergonomics manufacturer with extensive wrist-rest and keyboard-tray patent portfolio spanning both design and utility filings. Forward citations from Fellowes patents tend to lead to current commercial-product filings, and the company has filed in heated-product directions in the past.
Office accessories manufacturer with wrist-rest and ergonomic-peripheral filings. Often co-cited with Fellowes in examiner art rejections, so their portfolio is part of the standard examiner search whether we surface it or not. Worth a thorough portfolio review.
Gaming-peripheral manufacturers. Less wrist-rest-specific, but the heated-peripheral and RGB-illuminated-peripheral filings from these assignees (US 9,144,289 B2 is in this family) include the most recent thermal-control and feedback-loop art. If any of these has filed on a heated wrist rest specifically, the application is most likely to live in one of these portfolios and may not yet have published.
Smaller assignees in the gel- and foam-based wrist-support segment. Worth a quick check to confirm there are no surprise pneumatic-conversion filings that have crossed from gel into air-based adjustability.
Beyond assignee search, also check named inventors on the seed patents and on the patents that surface in earlier search steps. Inventors who move between companies often continue filing in the same technical space at their new employer, and assignee-only search misses the patents they file solo, under shell entities, or for non-corporate assignees. PatentsView's inventor endpoint surfaces every patent by a named inventor across all assignees in a single query.
Recent filings (the last 12-18 months) are the highest-risk category. A US application filed 14 months ago will publish in about 4 months, and any prior art disclosed in that application only becomes visible at publication. Watching these assignees' filing patterns lets you predict where prior art is likely to land before it lands — which is the difference between filing first and being blindsided by an examiner citation later.
No provisional or non-provisional has been filed yet. Today's date acts as the de facto earliest novelty cutoff. Once a provisional is filed, that filing date becomes the priority date and only documents published before that date can be cited against you.
US patent law (AIA §102(b)) provides a 12-month grace period for the inventor's own public disclosures. If you have already presented your idea at a conference, posted about it online, demoed it at a trade show, pitched it to investors in a public forum, or otherwise disclosed it publicly, you have 12 months from that disclosure date to file a US patent application. After 12 months, your own disclosure becomes prior art against you.
Most other major jurisdictions provide NO grace period. The European Patent Office, China, Japan, Korea, India, Brazil, Australia, and most other countries treat any public disclosure before the filing date as novelty-destroying — including disclosures made by the inventor. If international protection matters, file BEFORE any public disclosure or you forfeit those rights even if you preserve US rights through the grace period.
This is research planning, not legal opinion. A registered patent practitioner should verify findings before any filing decisions.
You're seeing the opening of a real prior-art search strategy — the classification map, keyword sets, and Boolean queries. Create a free account to see the complete plan, and build one for your own idea.
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