Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12398906 | Air conditioning control system | Yaguang Wei, Tomohiro Mashita, Photchara Ratsamee, Yuki Uranishi | 2025-08-26 |
| 12317987 | Shoulder belt and bag | Arata Kamo, Yuki Yamada | 2025-06-03 |
| 11291885 | Swing analysis device, swing analysis method, and swing analysis system | Yasuyuki Ohta, Kensuke Maenaka | 2022-04-05 |
| 11007411 | Method for manufacturing iron golf club head, iron golf club head, and iron golf club | Kazuhiro Doi, Jun Yoshikawa | 2021-05-18 |
| 10688354 | Method for manufacturing iron golf club head, iron golf club head, and iron golf club | Kazuhiro Doi, Jun Yoshikawa | 2020-06-23 |
| 9597563 | Multi-track adjustable golf club | Chris Voshall, David Llewellyn, Kazuya Ishida, Kei Tsuji | 2017-03-21 |
| 9333399 | Adjustable golf club | David Llewellyn | 2016-05-10 |
| 8715101 | Iron golf club | Takeshi Naruo, Kazuya Ishida, Takashi Kimura, Yasuyuki Ohta | 2014-05-06 |
| 8597134 | Golf club | Takeshi Naruo, Kazuya Ishida, Takashi Kimura, Yoshinobu Watanabe | 2013-12-03 |
| 8021246 | Iron golf club heads and golf club sets with variable weight distribution | David Llewellyn, Isamu Toshinari, Kazuhiro Doi, Tomoaki Aoki | 2011-09-20 |
| 8016694 | Golf club head and golf clubs | David Llewellyn, Masao Nagai | 2011-09-13 |
| 7972222 | Iron golf club heads and golf club sets with variable weight distribution | David Llewellyn, Kazuhiro Doi | 2011-07-05 |
| D639363 | Wood-type golf club | David Llewellyn, Arata Kamo | 2011-06-07 |
| D618295 | Fairway wood-type golf club head | David Llewellyn, Mamoru Saraie | 2010-06-22 |
| D617858 | Driver-type golf club head | David Llewellyn, Tsugunobo Sakamoto | 2010-06-15 |
| D617403 | Driver-type golf club head | David Llewellyn, Tsugunobo Sakamoto, Mamoru Saraie | 2010-06-08 |
| D611554 | Back design for an iron golf club head | David Llewellyn, Tsugunobo Sakamoto, Tomoaki Aoki | 2010-03-09 |
| 7611424 | Golf club head and golf club | Masao Nagai, David Llewellyn | 2009-11-03 |
| D600766 | Back design for an iron golf club head | David Llewellyn | 2009-09-22 |