KDDI has a total of 11123 patents globally, out of which 7195 have been granted. Of these 11123 patents, more than 49% patents are active. Japan is where KDDI has filed the maximum number of patents, followed by the United States of America and Europe. Parallelly, Japan seems to be the main focused R&D centre and also is the origin country of KDDI.
KDDI was founded in the year 1984. KDDI sells mobile handsets and offers mobile communication services. The company also offers broadband services as well. As of December 2022, market cap of KDDI is $63.09 Billion.
Do read about some of the most popular patents of KDDI which have been covered by us in this article and also you can find KDDI patents information, the worldwide patent filing activity and its patent filing trend over the years, and many other stats over KDDI patent portfolio.
How many patents does the founder of KDDI have?
The founder Kazuo Inamori has 44 patents.
How many patents does KDDI have?
KDDI has a total of 11123 patents globally. These patents belong to 9207 unique patent families. Out of 11123 patents, 5517 patents are active.
How Many Patents did KDDI 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 | KDDI Applications Filed | KDDI Patents Granted |
| 2022 | 113 | 568 |
| 2021 | 459 | 553 |
| 2020 | 567 | 419 |
| 2019 | 550 | 571 |
| 2018 | 576 | 439 |
| 2017 | 608 | 504 |
| 2016 | 547 | 382 |
| 2015 | 520 | 375 |
| 2014 | 765 | 443 |
| 2013 | 650 | 528 |
| 2012 | 543 | 533 |
| 2011 | 557 | 489 |
How many KDDI patents are Alive/Dead?
How Many Patents did KDDI File in Different Countries?
Countries in which KDDI Filed Patents
| Country | Patents |
| Japan | 9231 |
| United States Of America | 725 |
| Europe | 265 |
| China | 177 |
| Germany | 106 |
| Korea (South) | 53 |
| India | 21 |
| Taiwan | 18 |
| Singapore | 14 |
| France | 14 |
| Australia | 12 |
| United Kingdom | 12 |
| Canada | 9 |
| Hong Kong (S.A.R.) | 6 |
| Brazil | 4 |
| Israel | 1 |
| Sweden | 1 |
Where are the Research Centres of KDDI Patents Located?
10 Best KDDI Patents
US8281397B2 is the most popular patent in the KDDI portfolio. It has received 98 citations so far from companies like Cisco Technology, Fortinet, and Telcordia Technologies.
Below is the list of 10 most cited patents of KDDI:
| Publication Number | Citation Count |
| US8281397B2 | 98 |
| US6532091B1 | 93 |
| JP2002049766A | 90 |
| US8687000B2 | 9 |
| US8356301B2 | 9 |
| US8335354B2 | 9 |
| US7385627B2 | 9 |
| US6768872B1 | 9 |
| US6516110B2 | 9 |
| US20100322316A1 | 9 |
How many inventions of other companies were rejected due to KDDI patents?
The statistics below share strategic R&D insights. It tells the companies that were trying to protect inventions similar to KDDI invention. They couldn’t because KDDI had protected those before them.
Examiners at the USPTO used 299 KDDI patents in 1603 rejections (35 USC § 102 or 35 USC § 103 types).
The top citing companies in the KDDI patent portfolio are Samsung, Sony and Fujitsu.
List of the Companies whose Patents were rejected citing KDDI –
| Company | Number of Patent Applications that faced Rejection Citing KDDI Patents | Number of Rejections (102 & 103) |
| Samsung | 54 | 120 |
| Sony | 30 | 85 |
| Fujitsu | 29 | 59 |
| Qualcomm | 22 | 51 |
| Canon | 21 | 33 |
| Apple | 20 | 41 |
| Ericsson | 20 | 33 |
| Huawei | 19 | 42 |
| IBM | 16 | 23 |
| LG Electronics | 15 | 25 |
Count of 102 and 103 Type Rejections based on KDDI Patents
Top KDDI Patents used in Rejecting Most Patent Applications
| Patent Number | Count of Rejected Applications |
| US20060153132A1 | 18 |
| US9454230B2 | 13 |
| US7877057B2 | 12 |
| US9244544B2 | 12 |
| US9389722B2 | 12 |
| US20120052899A1 | 12 |
| US20120221700A1 | 12 |
| US8849063B2 | 11 |
| US20110255526A1 | 10 |
| US9720587B2 | 10 |
| US7486928B2 | 10 |
| US7317747B2 | 10 |
| US7835268B2 | 9 |
| US8279343B2 | 9 |
| US7872999B2 | 9 |
What Percentage of KDDI US Patent Applications were Granted?
KDDI (Excluding its subsidiaries) has filed 541 patent applications at USPTO so far (Excluding Design and PCT applications). Out of these 361 have been granted leading to a grant rate of 75.52%.
Below are the key stats of KDDI patent prosecution at the USPTO.
Which Law Firms Filed Most US Patents for KDDI?
| Law Firm | Total Applications | Success Rate |
| Whda | 101 | 77.23% |
| Morgan Lewis & Bockius | 61 | 68.85% |
| Foley & Lardner | 51 | 84.62% |
| Greenblum & Bernstein | 44 | 82.05% |
| Fitch Even Tabin & Flannery | 32 | 63.33% |
| Oliff | 32 | 81.25% |
| Lewis Roca | 31 | 70.97% |
| Westman Champlin & Koehler | 24 | 79.17% |
| Locke Lord | 21 | 76.19% |
| Oblon Mcclelland Maier & Neustadt | 19 | 89.47% |