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

According to USPTO PatentsView (2015–2025 granted utility patents), Yamamoto Kogaku Co., Ltd. ranks #23,707 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 Yamamoto Kogaku Co., Ltd. hold?

Yamamoto Kogaku Co., Ltd. holds 12 US utility patents granted between 2015 and 2023, spanning 14 technology areas.

What is Yamamoto Kogaku Co., Ltd.'s Innovation Score?

Yamamoto Kogaku Co., Ltd. has an Innovation Score of 47.3 out of 100 (top 19% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

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

Yamamoto Kogaku Co., Ltd.'s recent grant velocity is -50% 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 Yamamoto Kogaku Co., Ltd.'s patents?

Yamamoto Kogaku Co., Ltd.'s patents average 8.7 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 Yamamoto Kogaku 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

Yamamoto Kogaku Co., Ltd.

Q: What technology areas does Yamamoto Kogaku Co., Ltd. focus on?

Yamamoto Kogaku Co., Ltd.'s top technology area is G02C (SPECTACLES; Sunglasses OR Goggles Insofar AS They Have THE Same Features AS SPECTACLES; Contact Lenses) with 5 patents, ranking #121 of 397 assignees active in that subclass. Grants appear in 14 CPC subclasses total.

USPTO PatentsView assignee record - 12 granted patents across 14 technology areas, recorded in grant years 2015–2023. 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: G02C (SPECTACLES; Sunglasses OR Goggles Insofar AS They Have THE Same Features AS SPECTACLES; Contact Lenses).

Compiled by PlainPatent · May 15, 2026

RSS updates for this company

Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Yamamoto ranks #23,707 of 49,997 tracked US assignees by granted-patent volume, with 12 patents across 14 technology areas.

#23,707
of 49,997 US assignees by volume: Top 19%
by Innovation Score (47.3/100): 8.7
avg claims per patent: -50%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R23707 · Foreign Corporation #23,707 · 12 grants

GRANTS-MICRO · MID-PACK · PHOTO-FINISH · CPC-FOCUS · INNOV-PAR · CLAIMS-PAR · TYPE-FRNCORP · VEL-DROP · BOOK-FULL

GRANTS-MICRO 12 grants
MID-PACK #23,707/49,997
PHOTO-FINISH Xirgo
CPC-FOCUS G02C · 14 areas
INNOV-PAR 47.3/100
CLAIMS-PAR 8.7 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-DROP -50% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Xirgo Technologies, 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 Yamamoto’s 47.3 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 8.9 pts (19%) Velocity 20.0 pts (42%) Breadth 13.2 pts (28%) Claim depth 5.2 pts (11%)

Qualcomm Incorporated · highest

85
Yamamoto Kogaku · this assignee

47
3D Lighting… · lowest

7

What this shows Yamamoto's Innovation Score is 47.3/100 (top 19% 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 Yamamoto?

Each dot is one of Yamamoto’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). Yamamoto’s own 8.7 claims/patent is ABOVE the 7.7 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

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

Where Yamamoto's grants concentrate

Yamamoto Kogaku Co., Ltd. is a focused PatentsView assignee: 14 CPC subclasses with 41.7% of grants classified under G02C (SPECTACLES; Sunglasses OR Goggles Insofar AS They Have THE Same Features AS SPECTACLES; Contact Lenses). Peak complete grant year is 2015 (5 grants) versus a trough of 1 in 2018. By volume, Yamamoto sits between Xirgo Technologies, LLC and Yuan LI Hsing Industrial Co., Ltd..

Yamamoto's three-year grant acceleration

Yamamoto Kogaku Co., Ltd. shows 4 grants in 2022–2024 against only 0 in 2019–2021. That prior window is too thin for a growth multiple (rename and spin-out assignees look artificially high when the baseline is near zero), so PlainPatent withholds a ranked acceleration claim here.

Xirgo

12
Xitore

12
Xoc Pharmaceutica…

12
Y-biologics

12
Yamauchi

12
Yancheng Institut…

12
YU Jing Technology

12
Yuan LI Hsing Ind…

12
Yamamoto Kogaku ◀

12

What this shows Yamamoto holds 12 patents at rank #23,693, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Yamamoto

By rank, the assignees closest to #23,693 in granted patent volume.

Leaders in G02C (Spectacles)

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

Yamamoto's Innovation Score vs. every tracked assignee

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

47 Top 19% higher than 81% 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 · 2015–2023

Grants by year

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

View data table

Yamamoto Kogaku Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	5	41.7%
2016	2	16.7%
2018	1	8.3%
2022	2	16.7%
2023	2	16.7%

Which technologies does Yamamoto Kogaku Co., Ltd. patent most?

G02C - SPECTACLES; Sunglasses OR Goggles Insofar AS They Have THE Same Features AS SPECTACLES; Contact Lenses 5

G02B - Optical Elements, Systems OR Apparatus 3

A61F - Filters Implantable Into Blood VESSELS; PROSTHESES; Devices Providing Patency TO, OR Preventing Collapsing OF, Tubular Structures OF THE Body, e.g. STENTS; Orthopaedic, Nursing OR Contraceptive DEVICES; FOMENTATION; Treatment OR Protection OF Eyes OR EARS; Bandages, Dressings OR Absorbent PADS; Firs 3

A62B - Devices, Apparatus OR Methods FOR Life-saving 2

A42B - HATS; Head Coverings 2

G02F - Optical Devices OR Arrangements FOR THE Control OF Light BY Modification OF THE Optical Properties OF THE Media OF THE Elements Involved THEREIN; Non-linear OPTICS; Frequency-changing OF LIGHT; Optical Logic ELEMENTS; Optical ANALOGUE/DIGITAL Converters 1

G01L - Measuring Force, Stress, Torque, Work, Mechanical Power, Mechanical Efficiency, OR Fluid Pressure 1

A41D - OUTERWEAR; Protective GARMENTS; Accessories 1

Y10T - Technical Subjects Covered BY Former US Classification 1

A44B - Buttons, Pins, Buckles, Slide Fasteners, OR THE Like 1

A61M - Devices FOR Introducing Media Into, OR Onto, THE Body ; Devices FOR Transducing Body Media OR FOR Taking Media From THE Body ; Devices FOR Producing OR Ending Sleep OR Stupor 1

G01M - Testing Static OR Dynamic Balance OF Machines OR STRUCTURES; Testing OF Structures OR Apparatus, NOT Otherwise Provided FOR 1

G06F - Electric Digital Data Processing 1

H04N - Pictorial Communication, e.g. Television 1

Top 14 of 14 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

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

Yamamoto Kogaku Co., Ltd.'s lead technology class is G02C (SPECTACLES; Sunglasses OR Goggles Insofar AS They Have THE Same Features AS SPECTACLES; Contact Lenses), 41.7% of its portfolio - see every assignee active in that class. Explore G02C
Ranked #23,707 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Yamamoto Kogaku Co., Ltd. against Xirgo Technologies, LLC, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 47.3/100 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.