Where does TGK Co., Ltd. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), TGK Co., Ltd. ranks #6,718 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 TGK Co., Ltd. hold?

TGK Co., Ltd. holds 50 US utility patents granted between 2015 and 2021, spanning 11 technology areas.

What is TGK Co., Ltd.'s Innovation Score?

TGK Co., Ltd. has an Innovation Score of 29.4 out of 100 (31st percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does TGK Co., Ltd. focus on?

TGK Co., Ltd.'s top technology area is F25B (Refrigeration Machines, Plants OR SYSTEMS; Combined Heating AND Refrigeration SYSTEMS; Heat Pump Systems) with 26 patents, ranking #44 of 704 assignees active in that subclass. Grants appear in 11 CPC subclasses total.

Is TGK Co., Ltd.'s patent grant rate increasing or decreasing?

TGK Co., Ltd.'s recent grant velocity is -86% 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 TGK Co., Ltd.'s patents?

TGK Co., Ltd.'s patents average 6.8 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 TGK Co., Ltd. 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

TGK Co., Ltd.

USPTO PatentsView assignee record - 50 granted patents across 11 technology areas, recorded in grant years 2015–2021. 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: F25B (Refrigeration Machines, Plants OR SYSTEMS; Combined Heating AND Refrigeration SYSTEMS; Heat Pump Systems).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, TGK ranks #6,718 of 49,997 tracked US assignees by granted-patent volume, with 50 patents across 11 technology areas.

#6,718
of 49,997 US assignees by volume: 31st percentile
by Innovation Score (29.4/100): 6.8
avg claims per patent: -86%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R6718 · Foreign Corporation #6,718 · 50 grants

GRANTS-SMALL · UPPER-Q · PHOTO-FINISH · CPC-FOCUS · INNOV-THIN · CLAIMS-SPARSE · TYPE-FRNCORP · VEL-DROP · BOOK-FULL

GRANTS-SMALL 50 grants
UPPER-Q #6,718/49,997
PHOTO-FINISH SnapRays
CPC-FOCUS F25B · 11 areas
INNOV-THIN 29.4/100
CLAIMS-SPARSE 6.8 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DROP -86% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: SnapRays, LLC (±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 TGK’s 29.4 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 13.6 pts (46%) Velocity 0.0 pts (0%) Breadth 11.7 pts (40%) Claim depth 4.1 pts (14%)

Qualcomm Incorporated · highest

85
ARM Finance Overseas · near

29
Cloudsight · near

29
TGK · this assignee

29
IPL · near

29
Spectrum Diversified… · near

29
3D Lighting… · lowest

7

What this shows TGK's Innovation Score is 29.4/100 (31st percentile 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 TGK?

Each dot is one of TGK’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). TGK’s own 6.8 claims/patent is at or below the 15.5 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where TGK's grants concentrate

TGK Co., Ltd. is a focused PatentsView assignee: 11 CPC subclasses with 52% of grants classified under F25B (Refrigeration Machines, Plants OR SYSTEMS; Combined Heating AND Refrigeration SYSTEMS; Heat Pump Systems). Peak complete grant year is 2017 (17 grants) versus a trough of 2 in 2021. By volume, TGK sits between SnapRays, LLC and ThermoChem Recovery International, Inc..

Snaprays

50
Snowie

50
Superior Communic…

50
Synergy Blue

50
Trisa Holding

50
Tangible Play

50
The Strategic Coa…

50
Thermochem Recove…

50
TGK ◀

50

What this shows TGK holds 50 patents at rank #6,715, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near TGK

By rank, the assignees closest to #6,715 in granted patent volume.

Leaders in F25B (Refrigeration Machines)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for TGK, neither rank-band nor same-CPC leaders (those blocks stay above). In F25B (Refrigeration Machines), TGK ranks #44 of 704 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (29 here).

ARM Finance Overseas Limited 29 Cloudsight, Inc. 29 IPL Inc. 29 Spectrum Diversified Designs, LLC 29

Similar claim depth

Nearest assignees by average claims per patent (6.8 here).

Duquesne University of the Holy Spirit 6.8 avg Citizen Watch Co., Ltd. 6.8 avg Hiwin Technologies Corp. 6.8 avg Nifco Inc. 6.8 avg

TGK's Innovation Score vs. every tracked assignee

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

29 31st percentile higher than 31% 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 · 2015–2021

Grants by year

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

View data table

TGK Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	3	6.0%
2016	9	18.0%
2017	17	34.0%
2018	9	18.0%
2019	6	12.0%
2020	4	8.0%
2021	2	4.0%

Which technologies does TGK Co., Ltd. patent most?

F25B - Refrigeration Machines, Plants OR SYSTEMS; Combined Heating AND Refrigeration SYSTEMS; Heat Pump Systems 26

F16K - VALVES; TAPS; COCKS; ACTUATING-FLOATS; Devices FOR Venting OR Aerating 25

F04B - Positive-displacement Machines FOR LIQUIDS; Pumps 14

Y02B - Climate Change Mitigation Technologies Related TO Buildings, e.g. Housing, House Appliances OR Related End-user Applications 8

Y10T - Technical Subjects Covered BY Former US Classification 7

H02K - Dynamo-electric Machines 3

G05D - Systems FOR Controlling OR Regulating Non-electric Variables 2

B60H - Arrangements OF Heating, Cooling, Ventilating OR Other Air-treating Devices Specially Adapted FOR Passenger OR Goods Spaces OF Vehicles 2

F16F - SPRINGS; SHOCK-ABSORBERS; Means FOR Damping Vibration 2

F04C - Rotary-piston, OR Oscillating-piston, Positive-displacement Machines FOR Liquids ; Rotary-piston, OR Oscillating-piston, Positive-displacement Pumps 2

H02P - Control OR Regulation OF Electric Motors, Electric Generators OR Dynamo-electric CONVERTERS; Controlling Transformers, Reactors OR Choke Coils 1

Top 11 of 11 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

TGK Co., Ltd.'s patent record in context - here's where to go next.

TGK Co., Ltd.'s lead technology class is F25B (Refrigeration Machines, Plants OR SYSTEMS; Combined Heating AND Refrigeration SYSTEMS; Heat Pump Systems), 52% of its portfolio - see every assignee active in that class. Explore F25B
Ranked #6,718 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare TGK Co., Ltd. against SnapRays, LLC, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 29.4/100 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.