Where does Rinnai Corporation rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Rinnai Corporation ranks #3,161 of 49,997 assignees by granted-patent volume, the same sort as the companies listing and top-holders ranking. See /methodology/#corpus-placement.

How many patents does Rinnai Corporation hold?

Rinnai Corporation holds 119 US utility patents granted between 2015 and 2025, spanning 36 technology areas.

What is Rinnai Corporation's Innovation Score?

Rinnai Corporation has an Innovation Score of 44.0 out of 100 (top 27% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Rinnai Corporation focus on?

Rinnai Corporation's top technology area is F24H (Fluid Heaters, e.g. Water OR AIR Heaters, Having Heat-generating Means, e.g. Heat Pumps, IN General) with 62 patents, ranking #5 of 303 assignees active in that subclass. Grants appear in 36 CPC subclasses total.

Is Rinnai Corporation's patent grant rate increasing or decreasing?

Rinnai Corporation's recent grant velocity is -7% compared to the prior five-year period (grant years, not application filing dates). Grant activity has slowed relative to earlier years.

What does claim depth mean for Rinnai Corporation's patents?

Rinnai Corporation's patents average 4.5 claims each. This is an aggregate descriptive count from the grant record; it does not establish claim scope, legal strength, enforceability, or design-around risk.

How is the Rinnai Corporation patent data sourced?

All patent data comes from USPTO PatentsView, a public research dataset maintained by the United States Patent and Trademark Office covering US granted utility patents from 2015 to 2025.

USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Rinnai Corporation

USPTO PatentsView assignee record - 119 granted patents across 36 technology areas, recorded in grant years 2015–2025. Grant-trend analysis is cross-referenced to USPTO Patent Public Search; it does not measure application filings, current R&D, or legal strength. Primary class: F24H (Fluid Heaters, e.g. Water OR AIR Heaters, Having Heat-generating Means, e.g. Heat Pumps, IN General).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Rinnai ranks #3,161 of 49,997 tracked US assignees by granted-patent volume, with 119 patents across 36 technology areas.

#3,161
of 49,997 US assignees by volume: Top 27%
by Innovation Score (44.0/100): 4.5
avg claims per patent: -7%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R3161 · Foreign Corporation #3,161 · 119 grants

GRANTS-MID · TOP-DECILE · PHOTO-FINISH · CPC-FOCUS · INNOV-PAR · CLAIMS-SPARSE · TYPE-FRNCORP · VEL-FLAT · BOOK-FULL

GRANTS-MID 119 grants
TOP-DECILE #3,161/49,997
PHOTO-FINISH Icom Incorporated
CPC-FOCUS F24H · 36 areas
INNOV-PAR 44.0/100
CLAIMS-SPARSE 4.5 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-FLAT -7% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Icom Incorporated (±0 grants)

Instrument codes from this assignee’s USPTO PatentsView grant sheet: volume band, corpus rank, photo-finish peer, lead CPC, Innovation Score, claim depth, assignee type, velocity, and book completeness. Not a USPTO rating of patent strength.

How Rinnai’s 44.0 Innovation Score adds up

The same four weighted components behind every Innovation Score on PlainPatent: portfolio volume, grant velocity, technology breadth, and claim depth.

Volume 16.5 pts (38%) Velocity 3.6 pts (8%) Breadth 21.2 pts (48%) Claim depth 2.7 pts (6%)

Qualcomm Incorporated · highest

85
Amazentis · near

44
FTE automotive · near

44
Genghiscomm Holdings · near

44
Otsuka Pharmaceutica… · near

44
Rinnai · this assignee

44
3D Lighting… · lowest

7

What this shows Rinnai's Innovation Score is 44.0/100 (top 27% of the PatentsView-derived corpus). The chart places that score against the nearest Innovation Score peers plus corpus poles, not a reprint of the volume ranking.

Does more volume mean deeper claims for Rinnai?

Each dot is one of Rinnai’s 8 nearest volume peers (same corpus rank neighbourhood as the chart above), placed by total granted patents (horizontal) against average claims per patent (vertical). Rinnai’s own 4.5 claims/patent is at or below the 11.1 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

Rinnai vs its 8 nearest volume peers: granted patents vs average claims per patent. Source: USPTO PatentsView.

Where Rinnai's grants concentrate

Rinnai Corporation is a focused PatentsView assignee: 36 CPC subclasses with 52.1% of grants classified under F24H (Fluid Heaters, e.g. Water OR AIR Heaters, Having Heat-generating Means, e.g. Heat Pumps, IN General). Peak complete grant year is 2019 (22 grants) versus a trough of 3 in 2016. By volume, Rinnai sits between Icom Incorporated and Telebrands Corp..

Rinnai's three-year grant acceleration

From 2019–2021 to 2022–2024, Rinnai Corporation moved from 50 to 27 grants (0.54x the prior three-year total, a multiple, not a CAGR). Among 3,296 tracked assignees with ≥100 grants and ≥20 prior-period grants, that multiple ranks #2,595. See the growth leaderboard.

Icom Incorporated

119
Lifetime Brands

119
Nippon Steel Chem…

119
Ottobock SE & Kgaa

119
Rolls-royce High…

119
Suzhou Metabrain…

119
Swisscom

119
Telebrands

119
Rinnai ◀

119

What this shows Rinnai holds 119 patents at rank #3,161, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Rinnai

By rank, the assignees closest to #3,161 in granted patent volume.

Leaders in F24H (Fluid Heaters)

Other assignees with the most granted patents in Rinnai's primary technology class.

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Rinnai, neither rank-band nor same-CPC leaders (those blocks stay above). In F24H (Fluid Heaters), Rinnai ranks #5 of 303 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (44 here).

Genghiscomm Holdings, LLC 44 Otsuka Pharmaceutical Factory, Inc. 44 FTE automotive GmbH 44 Amazentis SA 44

Similar claim depth

Nearest assignees by average claims per patent (4.5 here).

SMC Corporation 4.5 avg Wahl Clipper Corporation 4.5 avg Blanco GMBH + Co KG 4.5 avg Hankook Tire Co., Ltd. 4.5 avg

Rinnai's Innovation Score vs. every tracked assignee

Composite of portfolio volume, grant velocity, technology breadth, and claim depth (0–100)

44 Top 27% higher than 73% of 49,997 US assignees

Each bar is a band; taller bars hold more US assignees. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source USPTO PatentsView, PlainPatent Innovation Score · 2015–2025

USPTO utility patent grants by year · 2015–2025

Grants by year

Teal-shaded recent years (2020–present) versus the 2015–2019 baseline. Full figures in the table below.

View data table

Rinnai Corporation patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	6	5.0%
2016	3	2.5%
2017	13	10.9%
2018	15	12.6%
2019	22	18.5%
2020	16	13.4%
2021	12	10.1%
2022	12	10.1%
2023	4	3.4%
2024	11	9.2%
2025partial year	5	4.2%

Which technologies does Rinnai Corporation patent most?

F24H - Fluid Heaters, e.g. Water OR AIR Heaters, Having Heat-generating Means, e.g. Heat Pumps, IN General 62

F23D - Burners 45

Y02B - Climate Change Mitigation Technologies Related TO Buildings, e.g. Housing, House Appliances OR Related End-user Applications 23

F28F - Details OF Heat-exchange AND Heat-transfer Apparatus, OF General Application 22

F28D - Heat-exchange Apparatus, NOT Provided FOR IN Another Subclass, IN Which THE Heat-exchange Media DO NOT Come Into Direct Contact 21

F23N - Regulating OR Controlling Combustion 20

F24D - Domestic- OR Space-heating Systems, e.g. Central Heating SYSTEMS; Domestic Hot-water Supply SYSTEMS; Elements OR Components Therefor 15

F23L - Supplying AIR OR Non-combustible Liquids OR Gases TO Combustion Apparatus IN General ; Valves OR Dampers Specially Adapted FOR Controlling AIR Supply OR Draught IN Combustion Apparatus ; Inducing Draught IN Combustion APPARATUS; Tops FOR Chimneys OR Ventilating SHAFTS; Terminals FOR Flues 13

F16K - VALVES; TAPS; COCKS; ACTUATING-FLOATS; Devices FOR Venting OR Aerating 7

G05D - Systems FOR Controlling OR Regulating Non-electric Variables 6

F23M - Casings, Linings, Walls OR Doors Specially Adapted FOR Combustion Chambers, e.g. FIREBRIDGES; Devices FOR Deflecting AIR, Flames OR Combustion Products IN Combustion CHAMBERS; Safety Arrangements Specially Adapted FOR Combustion APPARATUS; Details OF Combustion Chambers, NOT Otherwise Provided FOR 6

F23K - Feeding Fuel TO Combustion Apparatus 6

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution 5

Y10T - Technical Subjects Covered BY Former US Classification 4

F04D - Non-positive-displacement Pumps 4

Top 15 of 36 technology areas

More on this record

Data Source

USPTO PatentsView, US granted patents 2015–2025

View all rankings → How is Innovation Score calculated?

What to do with this data

Rinnai Corporation's patent record in context - here's where to go next.

Rinnai Corporation's lead technology class is F24H (Fluid Heaters, e.g. Water OR AIR Heaters, Having Heat-generating Means, e.g. Heat Pumps, IN General), 52.1% of its portfolio - see every assignee active in that class. Explore F24H
Ranked #3,161 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Rinnai Corporation against Icom Incorporated, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 44.0/100 blends volume, velocity, technology breadth, and claim depth. How it's calculated

Figures reflect USPTO PatentsView grant data through May 2026; pending applications not yet granted are not counted.

Data sourced from USPTO PatentsView - official U.S. government patent data. See our methodology for computation details. Retrieved and formatted by PlainPatent

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the USPTO PatentsView database. Consult a qualified professional before making decisions based on this data.

Read our methodology - how this data is sourced, computed, and verified.

Data sources used on this page

USPTO PatentsView - the disambiguated bulk patent-grant, assignee, and CPC data this page's figures are derived from. patentsview.org
Cooperative Patent Classification (CPC) - the joint USPTO/EPO classification scheme used to group patents by technology area. cooperativepatentclassification.org
USPTO Patent Public Search - the official interface to verify the status of any individual patent. ppubs.uspto.gov

Compiled by PlainPatent , US Patent Intelligence Editorial Process · May 15, 2026

Every figure on PlainPatent is rendered directly from USPTO source data, no number is typed in by an editor. This page draws directly on USPTO source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.