PlainPatent
USPTO 2015–2025 USPTO PatentsView Foreign Corporation

YAMAGUCHI SEIKEN KOGYO CO., LTD.

USPTO PatentsView assignee record — 9 granted patents across 9 technology areas, active 2018–2020. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: G11B (INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER).

Explore the portfolio See the ranking
9
Total patents granted
9
CPC technology areas
8.9
Avg claims per patent
+25%
5-year filing velocity

Portfolio overview

YAMAGUCHI SEIKEN KOGYO CO., LTD. has been granted 9 US utility patents between 2018 and 2020, placing YAMAGUCHI SEIKEN KOGYO CO., LTD. at rank #30,619 across all assignees tracked by PlainPatent. This portfolio spans 9 distinct Cooperative Patent Classification (CPC) subclasses, averaging 8.9 claims per patent with primary concentration in G11B (INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER). As a Foreign Corporation, YAMAGUCHI SEIKEN KOGYO CO., LTD. is one of the more focused assignees in the PatentsView dataset. The composite Innovation Score of 23.9/100 blends portfolio volume, filing velocity, technology breadth, and claim depth into a single comparable measure drawn directly from USPTO PatentsView records.

Filing cadence tells the strategic story. Between 2020 and 2025 the company received 5 grants, compared with 4 in the 2015–2019 window — a +25% shift in five-year velocity. Steady filing volume suggests sustained innovation without dramatic pivots. The Foreign Corporation classification further shapes interpretation, since corporate, government, and individual filers pursue patents for materially different reasons.

Claim depth and technology breadth together indicate competitive posture. YAMAGUCHI SEIKEN KOGYO CO., LTD.'s 8.9 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while concentration in 9 subclasses points to a focused technical program. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark YAMAGUCHI SEIKEN KOGYO CO., LTD. against peers pursuing similar technology classes.

How does YAMAGUCHI compare?

Granted US patents 2015–2025 versus the largest corporate holders — this company marked ◀

patents

What this shows YAMAGUCHI holds 9 patents — placing it at rank #30,619 overall, well behind the volume leaders but ahead of the tens of thousands of smaller assignees in the dataset.

Source USPTO PatentsView — granted utility patents As of 2015–2025

USPTO utility patent grants by year · 2018–2020

123456 201820192020 5
USPTO utility patent grants by year · 2018–2020

Grants by year

Teal-shaded recent years (2020–present) versus the 2018–2019 baseline. Full figures in the table below.

View data table
YAMAGUCHI SEIKEN KOGYO CO., LTD. patent grants by year, 2015–2025
Year Patents Granted Share of Period
2018 2 22.2%
2019 2 22.2%
2020 5 55.6%

Which technologies does YAMAGUCHI SEIKEN KOGYO CO., LTD. patent most?

Top 9 of 9 technology areas

Patent Moat Analysis

Portfolio Volume Light
Tech Breadth Focused
Claim Depth Simple
Velocity Growing

Where it ranks

Overall rank by patents

#30,619

Across all tracked assignees

Innovation Score

23.9 out of 100

View all rankings →

Data Source

USPTO PatentsView — US granted patents 2015–2025

How is Innovation Score calculated?

Frequently Asked Questions

How many patents does YAMAGUCHI SEIKEN KOGYO CO., LTD. hold?
YAMAGUCHI SEIKEN KOGYO CO., LTD. holds 9 US granted patents filed between 2018 and 2020, spanning 9 technology areas.
What is YAMAGUCHI SEIKEN KOGYO CO., LTD.'s Innovation Score?
YAMAGUCHI SEIKEN KOGYO CO., LTD. has an Innovation Score of 23.9 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).
What technology areas does YAMAGUCHI SEIKEN KOGYO CO., LTD. focus on?
YAMAGUCHI SEIKEN KOGYO CO., LTD.'s top technology area is G11B (INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER) with 8 patents. The company has filed patents in 9 CPC subclasses total.
Is YAMAGUCHI SEIKEN KOGYO CO., LTD.'s patent filing rate increasing or decreasing?
YAMAGUCHI SEIKEN KOGYO CO., LTD.'s recent filing velocity is +25% compared to the prior five-year period. The company is maintaining or growing its patent output.
What does claim depth mean for YAMAGUCHI SEIKEN KOGYO CO., LTD.'s patents?
YAMAGUCHI SEIKEN KOGYO CO., LTD.'s patents average 8.9 claims each. This is relatively simple claim structure, typical for focused inventions.
How is the YAMAGUCHI SEIKEN KOGYO 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.

Learn More

How Innovation Score Works

Understand the four dimensions behind the composite score
How to Read Patent Data

Plain-English guide to CPC codes, claims, and metrics
Patent Moat Analysis

How companies use patents as competitive barriers

Explore the patent dataset

G11B technology

YAMAGUCHI SEIKEN KOGYO CO., LTD.'s primary CPC class — all holders and yearly trends
Top 50 patent holders

See where YAMAGUCHI SEIKEN KOGYO CO., LTD. ranks among the largest US patent assignees
All technology classes

Browse every CPC technology area by patent activity
How the score works

The four dimensions behind the Innovation Score

Related

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

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.

All federal data sources used on this page
  • USPTO PatentsView — official U.S. Patent and Trademark Office bulk patent data. patentsview.org
  • USPTO Patent Application Information Retrieval (PAIR) — application status and file history. uspto.gov/patents/pair
  • USPTO Bulk Data Storage System — comprehensive patent text + claims dataset. bulkdata.uspto.gov
  • USPTO CPC Classification — Cooperative Patent Classification scheme for technology categorization. uspto.gov/cpc
  • SEC EDGAR — public filings cross-reference for assignee corporate entity matching. sec.gov/edgar
  • WIPO PATENTSCOPE — international patent context (related international filings). wipo.int/patentscope