Issued Patents 2011
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D650878 | Iron-type golf club head | David Llewellyn, Tsugunobu Sakamoto | 2011-12-20 |
| 8021246 | Iron golf club heads and golf club sets with variable weight distribution | David Llewellyn, Tetsuya Kanayama, Isamu Toshinari, Tomoaki Aoki | 2011-09-20 |
| D645103 | Iron-type golf club | David Llewellyn, Tsugunobu Sakamoto | 2011-09-13 |
| D641444 | Iron-type golf club head | David Llewellyn, Tsugunobu Sakamoto | 2011-07-12 |
| 7972222 | Iron golf club heads and golf club sets with variable weight distribution | David Llewellyn, Tetsuya Kanayama | 2011-07-05 |