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

According to USPTO PatentsView (2015–2025 granted utility patents), Seikoh Giken Co., Ltd. ranks #9,118 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 Seikoh Giken Co., Ltd. hold?

Seikoh Giken Co., Ltd. holds 35 US utility patents granted between 2015 and 2025, spanning 19 technology areas.

What is Seikoh Giken Co., Ltd.'s Innovation Score?

Seikoh Giken Co., Ltd. has an Innovation Score of 52.4 out of 100 (top 10% of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Seikoh Giken Co., Ltd. focus on?

Seikoh Giken Co., Ltd.'s top technology area is G02B (Optical Elements, Systems OR Apparatus) with 30 patents, ranking #459 of 4,891 assignees active in that subclass. Grants appear in 19 CPC subclasses total.

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

Seikoh Giken Co., Ltd.'s recent grant velocity is +36% compared to the prior five-year period (grant years, not application filing dates). The company is maintaining or growing its granted-patent output.

What does claim depth mean for Seikoh Giken Co., Ltd.'s patents?

Seikoh Giken Co., Ltd.'s patents average 11.3 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 Seikoh Giken 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

Seikoh Giken Co., Ltd.

USPTO PatentsView assignee record - 35 granted patents across 19 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: G02B (Optical Elements, Systems OR Apparatus).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Seikoh ranks #9,118 of 49,997 tracked US assignees by granted-patent volume, with 35 patents across 19 technology areas.

#9,118
of 49,997 US assignees by volume: Top 10%
by Innovation Score (52.4/100): 11.3
avg claims per patent: +36%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R9118 · Foreign Corporation #9,118 · 35 grants

GRANTS-SMALL · UPPER-Q · PHOTO-FINISH · CPC-FOCUS · INNOV-PAR · CLAIMS-PAR · TYPE-FRNCORP · VEL-UP · BOOK-FULL

GRANTS-SMALL 35 grants
UPPER-Q #9,118/49,997
PHOTO-FINISH Robotic Research OpCo
CPC-FOCUS G02B · 19 areas
INNOV-PAR 52.4/100
CLAIMS-PAR 11.3 claims/avg
TYPE-FRNCORP Foreign Corp
VEL-UP +36% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Robotic Research OpCo, 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 Seikoh’s 52.4 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 12.4 pts (24%) Velocity 17.8 pts (34%) Breadth 15.4 pts (29%) Claim depth 6.8 pts (13%)

Qualcomm Incorporated · highest

85
Dupont Safety &… · near

52
National Taipei… · near

52
Seikoh Giken · this assignee

52
Stamicarbon B V · near

52
Technology Partners · near

52
3D Lighting… · lowest

7

What this shows Seikoh's Innovation Score is 52.4/100 (top 10% 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 Seikoh?

Each dot is one of Seikoh’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). Seikoh’s own 11.3 claims/patent is at or below the 15.8 median for these volume peers. Volume here does not track with deeper claims; several lower-volume peers claim more thoroughly per patent.

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

Where Seikoh's grants concentrate

Seikoh Giken Co., Ltd. is a focused PatentsView assignee: 19 CPC subclasses with 85.7% of grants classified under G02B (Optical Elements, Systems OR Apparatus). Peak complete grant year is 2023 (7 grants) versus a trough of 1 in 2020. By volume, Seikoh sits between Robotic Research OpCo, LLC and Southern States, LLC.

Seikoh's three-year grant acceleration

Seikoh Giken Co., Ltd. shows 16 grants in 2022–2024 against only 6 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.

Robotic Research…

35
S I P A Societa'…

35
Sanofi Biotechnol…

35
Scinopharm Taiwan

35
Shannon Systems

35
Showa Glove

35
Sito Mobile R&D IP

35
Southern States

35
Seikoh Giken ◀

35

What this shows Seikoh holds 35 patents at rank #9,116, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Seikoh

By rank, the assignees closest to #9,116 in granted patent volume.

Leaders in G02B (Optical Elements)

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

Assignees with similar portfolio profiles

Two PlainPatent-derived peer sets for Seikoh, neither rank-band nor same-CPC leaders (those blocks stay above). In G02B (Optical Elements), Seikoh ranks #459 of 4,891 assignees by patent count in that subclass.

Similar innovation score

Nearest assignees by Innovation Score (52 here).

Technology Partners LLC 52 Dupont Safety & Construction, Inc. 52 Stamicarbon B.V. 52 National Taipei University of Technology 52

Seikoh's Innovation Score vs. every tracked assignee

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

52 Top 10% higher than 90% 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

Seikoh Giken Co., Ltd. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	3	8.6%
2016	3	8.6%
2018	5	14.3%
2019	3	8.6%
2020	1	2.9%
2021	2	5.7%
2022	6	17.1%
2023	7	20.0%
2024	3	8.6%
2025partial year	2	5.7%

Which technologies does Seikoh Giken Co., Ltd. patent most?

G02B - Optical Elements, Systems OR Apparatus 30

B24B - Machines, Devices, OR Processes FOR Grinding OR Polishing ; Dressing OR Conditioning OF Abrading SURFACES; Feeding OF Grinding, Polishing, OR Lapping Agents 6

H01R - Electrically-conductive CONNECTIONS; Structural Associations OF A Plurality OF Mutually-insulated Electrical Connecting ELEMENTS; Coupling DEVICES; Current Collectors 3

G01R - Measuring Electric VARIABLES; Measuring Magnetic Variables 3

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 2

B29L - Indexing Scheme Associated With Subclass B29c, Relating TO Particular Articles 2

B29C - Shaping OR Joining OF PLASTICS; Shaping OF Material IN A Plastic State, NOT Otherwise Provided FOR; After-treatment OF THE Shaped Products, e.g. Repairing 2

B44C - Producing Decorative Effects ; MOSAICS; Tarsia Work ; Paperhanging 2

G09F - DISPLAYING; ADVERTISING; SIGNS; Labels OR NAME-PLATES; Seals 2

B29K - Indexing Scheme Associated With Subclasses B29b, B29c OR B29d, Relating TO Moulding Materials OR TO Materials FOR ; Moulds, ; Reinforcements, Fillers OR Preformed Parts, e.g. Inserts 2

B65D - Containers FOR Storage OR Transport OF Articles OR Materials, e.g. Bags, Barrels, Bottles, Boxes, Cans, Cartons, Crates, Drums, Jars, Tanks, Hoppers, Forwarding CONTAINERS; Accessories, Closures, OR Fittings THEREFOR; Packaging ELEMENTS; Packages 2

B44F - Special Designs OR Pictures 2

H04N - Pictorial Communication, e.g. Television 1

A61B - DIAGNOSIS; SURGERY; Identification 1

H01Q - Antennas, i.e. Radio Aerials 1

Top 15 of 19 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

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

Seikoh Giken Co., Ltd.'s lead technology class is G02B (Optical Elements, Systems OR Apparatus), 85.7% of its portfolio - see every assignee active in that class. Explore G02B
Ranked #9,118 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Seikoh Giken Co., Ltd. against Robotic Research OpCo, LLC, an assignee filing at a similar volume. Compare portfolios
Innovation Score of 52.4/100 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.