NHK Spring has a total of 8198 patents globally, out of which 5193 have been granted. Of these 8198 patents, more than 47% patents are active. Japan is where NHK Spring has filed the maximum number of patents, followed by the USA and China. Parallelly, Japan seems to be the main focused R&D center and also Japan is the origin country of NHK Spring.
NHK Spring was founded in the year 1936. The Company manufactures springs for automobiles and electronic equipment also products are used for suspension, engine valves, seats, and hard disk drives.
Do read about some of the most popular patents of NHK Spring which have been covered by us in this article and also you can find NHK Spring patents information, the worldwide patent filing activity and its patent filing trend over the years, and many other stats over NHK Spring patent portfolio.
How many patents does the CEO of NHK Spring have?
The CEO Takashi Kayamoto have 101 patents.
How many patents does NHK Spring have?
NHK Spring has a total of 8198 patents globally. These patents belong to 3677 unique patent families. Out of 8198 patents, 3910 patents are active.
How Many Patents did NHK Spring File Every Year?
Are you wondering why there is a drop in patent filing for the last two years? It is because a patent application can take up to 18 months to get published. Certainly, it doesn’t suggest a decrease in the patent filing.
| Year of Patents Filing or Grant | NHK Applications Filed | NHK Patents Granted |
| 2023 | 4 | 109 |
| 2022 | 122 | 229 |
| 2021 | 261 | 259 |
| 2020 | 278 | 289 |
| 2019 | 334 | 344 |
| 2018 | 329 | 282 |
| 2017 | 401 | 274 |
| 2016 | 365 | 380 |
| 2015 | 406 | 314 |
| 2014 | 312 | 350 |
| 2013 | 528 | 342 |
| 2012 | 507 | 329 |
| 2011 | 597 | 264 |
How many NHK Spring patents are Alive/Dead?
Worldwide Patents
How Many Patents did NHK Spring File in Different Countries?
Countries in which NHK Spring Filed Patents
| Country | Patents |
| Japan | 3235 |
| United States Of America | 1122 |
| China | 838 |
| Europe | 528 |
| Korea (South) | 334 |
| Germany | 331 |
| Taiwan | 204 |
| India | 132 |
| Mexico | 91 |
| Spain | 79 |
| Singapore | 61 |
| Brazil | 52 |
| Canada | 41 |
| Malaysia | 40 |
| Hungary | 37 |
| Philippines | 36 |
| Indonesia | 33 |
| Australia | 32 |
| Italy | 20 |
| Russia | 13 |
| Austria | 11 |
| Viet Nam | 11 |
| Hong Kong (S.A.R.) | 8 |
| Poland | 7 |
| United Kingdom | 7 |
| France | 6 |
| Israel | 3 |
| South Africa | 3 |
| Turkey | 3 |
| Thailand | 2 |
| Macao | 1 |
| Denmark | 1 |
| Argentina | 1 |
Where are Research Centers of NHK Spring Patents Located?
10 Best NHK Spring Patents
US7503980B2 is the most popular patent in the NHK Spring portfolio. It has received 344 citations so far from companies like Asm Ip Holding, Applied Materials and Tokyo Electron Limited.
Below is the list of 10 most cited patents of NHK Spring:
| Publication Number | Citation Count |
| US7503980B2 | 344 |
| US7070232B2 | 127 |
| US6866339B2 | 101 |
| US6731472B2 | 86 |
| US20080138543A1 | 81 |
| US7092215B2 | 79 |
| US6963471B2 | 76 |
| US6597541B2 | 76 |
| US6661618B2 | 74 |
| US6628439B2 | 71 |
How many inventions of other companies were rejected due to NHK Spring patents?
The statistics below share strategic R&D insights. It tells the companies that were trying to protect inventions similar to NHK Spring invention. They couldn’t because NHK Spring had protected those before them.
Examiners at the USPTO referred 364 NHK Spring patents in 1190 rejections (35 USC § 102 or 35 USC § 103 types).
The top citing companies in the NHK Spring patent portfolio are Toyota, Nitto Denko and Hutchinson Technology.
List of the Companies whose Patents were rejected citing NHK Spring –
| Company | Number of Patent Applications that faced Rejection Citing NHK Patents | Number of Rejections (102 & 103) |
| Toyota | 27 | 41 |
| Nitto Denko | 19 | 40 |
| Hutchinson Technology | 14 | 33 |
| Ford | 14 | 19 |
| Ts Tech Co Ltd | 14 | 20 |
| Applied Materials | 10 | 25 |
| Gm Global Technology Operations Llc | 10 | 17 |
| Lear Corporation | 9 | 11 |
| Tachi-S Co Ltd | 8 | 12 |
| Tokyo Electron Limited | 8 | 19 |
Count of 102 and 103 Type Rejections based on NHK Spring Patents
Top NHK Spring Patents used in Rejecting Most Patent Applications
| Patent Number | Count of Rejected Applications |
| US7241346B2 | 12 |
| US20130072075A1 | 7 |
| US7092215B2 | 7 |
| US7137665B2 | 7 |
| US7057403B2 | 6 |
| US20100037976A1 | 5 |
| US7017997B2 | 5 |
| US7503980B2 | 5 |
| US7898272B2 | 5 |
| US8199442B2 | 5 |
| US20060159982A1 | 5 |
| US8393682B2 | 5 |
| US20150069128A1 | 4 |
| US8094416B2 | 4 |
| US8007381B2 | 4 |
What Percentage of NHK Spring US Patent Applications were Granted?
NHK Spring (Excluding its subsidiaries) has filed 1193 patent applications at USPTO so far (Excluding Design and PCT applications). Out of these 967 have been granted leading to a grant rate of 87.3%.
Below are the key stats of NHK Spring patent prosecution at the USPTO.
Which Law Firms Filed Most US Patents for NHK Spring?
| Law Firm | Total Applications | Success Rate |
| Holtz Holtz & Volek | 264 | 88.62% |
| C Bruce Hamburg | 143 | 95.56% |
| Locke Lord Llp | 138 | 71.43% |
| Oliff Plc | 105 | 83.81% |
| Knobbe Martens Olson & Bear | 76 | 98.61% |
| Macpherson Kwok Chen & Heid | 31 | 100.00% |
| Hauptman Ham Llp | 28 | 75.00% |
| Haynes And Boone | 26 | 80.77% |
| Cantor Colburn Llp | 19 | 75.00% |
| Dority & Manning | 19 | 100.00% |
What are NHK Spring key innovation segments?
What Technologies are Covered by NHK Spring?
The chart below distributes patents filed by NHK Spring