Overall rank by patents
#547
Across all tracked assignees
USPTO 2015–2025 USPTO PatentsView Foreign Corporation
NGK SPARK PLUG CO., LTD.
USPTO PatentsView assignee record — 823 granted patents across 119 technology areas, active 2015–2025. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: H01T (SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES).
823
Total patents granted
119
CPC technology areas
7.6
Avg claims per patent
-59%
5-year filing velocity
Portfolio overview
NGK SPARK PLUG CO., LTD. has been granted 823 US utility patents between 2015 and 2025, placing NGK SPARK PLUG CO., LTD. at rank #547 across all assignees tracked by PlainPatent. This portfolio spans 119 distinct Cooperative Patent Classification (CPC) subclasses, averaging 7.6 claims per patent with primary concentration in H01T (SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES). As a Foreign Corporation, NGK SPARK PLUG CO., LTD. is one of the broader-portfolio assignees in the PatentsView dataset. The composite Innovation Score of 54.3/100 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 239 grants, compared with 584 in the 2015–2019 window — a -59% shift in five-year velocity. A cooling filing rate may reflect portfolio consolidation, shifting priorities, or reduced R&D throughput. 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. NGK SPARK PLUG CO., LTD.'s 7.6 average claims per patent suggests focused, narrowly drawn claims typical of single-invention filings, while a diversified footprint across 100+ CPC subclasses spreads risk across many technology fronts. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark NGK SPARK PLUG CO., LTD. against peers pursuing similar technology classes.
How does NGK compare?
Granted US patents 2015–2025 versus the largest corporate holders — this company marked ◀
- Samsung
SAMSUNG ELECTRONICS CO., LTD.
106,890 patents
- International Bus…
International Business Machines Corporation
72,926 patents
- Canon 34,378
Canon Kabushiki Kaisha
34,378 patents
- LG 32,607
LG ELECTRONICS INC.
32,607 patents
- Taiwan Semiconduc… 31,041
TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
31,041 patents
- Apple 30,560
Apple Inc.
30,560 patents
- Qualcomm Incorpor… 30,354
QUALCOMM Incorporated
30,354 patents
- Intel 27,498
Intel Corporation
27,498 patents
- NGK Spark PLUG ◀ 823
NGK SPARK PLUG CO., LTD.
823 patents
What this shows NGK holds 823 patents — placing it at rank #547 overall, well behind the volume leaders but ahead of the tens of thousands of smaller assignees in the dataset.
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
| Year | Patents Granted | Share of Period |
|---|---|---|
| 2015 | 111 | 13.5% |
| 2016 | 123 | 14.9% |
| 2017 | 116 | 14.1% |
| 2018 | 122 | 14.8% |
| 2019 | 112 | 13.6% |
| 2020 | 102 | 12.4% |
| 2021 | 68 | 8.3% |
| 2022 | 35 | 4.3% |
| 2023 | 29 | 3.5% |
| 2024 | 4 | 0.5% |
| 2025 | 1 | 0.1% |
Which technologies does NGK SPARK PLUG CO., LTD. patent most?
Top 15 of 119 technology areas
Patent Moat Analysis
Portfolio Volume Moderate
Tech Breadth Diversified
Claim Depth Simple
Velocity Declining
Frequently Asked Questions
How many patents does NGK SPARK PLUG CO., LTD. hold?
NGK SPARK PLUG CO., LTD. holds 823 US granted patents filed between 2015 and 2025, spanning 119 technology areas.
What is NGK SPARK PLUG CO., LTD.'s Innovation Score?
NGK SPARK PLUG CO., LTD. has an Innovation Score of 54.3 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).
What technology areas does NGK SPARK PLUG CO., LTD. focus on?
NGK SPARK PLUG CO., LTD.'s top technology area is H01T (SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES) with 304 patents. The company has filed patents in 119 CPC subclasses total.
Is NGK SPARK PLUG CO., LTD.'s patent filing rate increasing or decreasing?
NGK SPARK PLUG CO., LTD.'s recent filing velocity is -59% compared to the prior five-year period. Filing activity has slowed relative to earlier years.
What does claim depth mean for NGK SPARK PLUG CO., LTD.'s patents?
NGK SPARK PLUG CO., LTD.'s patents average 7.6 claims each. This is relatively simple claim structure, typical for focused inventions.
How is the NGK SPARK PLUG 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
Explore the patent dataset
H01T technology
NGK SPARK PLUG CO., LTD.'s primary CPC class — all holders and yearly trends
Top 50 patent holders
See where NGK SPARK PLUG 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
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
