Issued Patents All Time
Showing 25 most recent of 68 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11794082 | Golf club head with sole side features | Kei Tsuji | 2023-10-24 |
| 11738242 | Wave sole for a golf club head | Kei Tsuji, Arata Kamo | 2023-08-29 |
| 10926141 | Wave sole for a golf club head | Kei Tsuji, Arata Kamo | 2021-02-23 |
| 10245488 | Vibration damping bat and methods of making the same | Brendan Kays, Yohei Yamashita | 2019-04-02 |
| 10159880 | Adjustable metal wood golf club head with moveable weight structure | Takayuki Mine, Kei Tsuji | 2018-12-25 |
| 9597563 | Multi-track adjustable golf club | Chris Voshall, Kazuya Ishida, Tetsuya Kanayama, Kei Tsuji | 2017-03-21 |
| 9333399 | Adjustable golf club | Tetsuya Kanayama | 2016-05-10 |
| D736875 | Iron-type golf club head | Kazuhiro Doi, Kazuhiko Natori | 2015-08-18 |
| D736872 | Iron-type golf club head | Kazuhiro Doi, Tsugunobu Sakamoto | 2015-08-18 |
| D720417 | Iron-type golf club head | Richard Delvac | 2014-12-30 |
| D720416 | Iron-type golf club head | Richard Delvac, Kazuhiko Natori | 2014-12-30 |
| D720026 | Iron-type golf club head | Isamu Toshinari, Kazuhiro Doi | 2014-12-23 |
| D682962 | Iron-type golf club head | Mamoru Saraie, Kazuhiro Doi | 2013-05-21 |
| D682961 | Iron-type golf club head | Kazuhiko Natori, Isamu Toshinari | 2013-05-21 |
| D669546 | Wood-type golf club | Tsugunobu Sakamoto | 2012-10-23 |
| D664621 | Iron-type golf club | Richard Delvac, Kazuhiku Natori | 2012-07-31 |
| D660390 | Iron-type golf club | — | 2012-05-22 |
| D659780 | Iron-type golf club | Tsugunobu Sakamoto | 2012-05-15 |
| D650877 | Iron-type golf club head | Isamu Toshinari, Arata Kamo | 2011-12-20 |
| D650878 | Iron-type golf club head | Kazuhiro Doi, Tsugunobu Sakamoto | 2011-12-20 |
| D650876 | Hybrid-type golf club head | Kazuya Ishida, Tetsu Kanayama, Arata Kamo | 2011-12-20 |
| 8021246 | Iron golf club heads and golf club sets with variable weight distribution | Tetsuya Kanayama, Isamu Toshinari, Kazuhiro Doi, Tomoaki Aoki | 2011-09-20 |
| D645103 | Iron-type golf club | Kazuhiro Doi, Tsugunobu Sakamoto | 2011-09-13 |
| 8016694 | Golf club head and golf clubs | Tetsuya Kanayama, Masao Nagai | 2011-09-13 |
| D641821 | Iron-type golf club head | Isamu Toshinari, Arata Kamo | 2011-07-19 |