Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D682959 | Iron-type golf club head | Isamu Toshinari, Tomo Aoki, Richard Delvac | 2013-05-21 |
| D682962 | Iron-type golf club head | David Llewellyn, Kazuhiro Doi | 2013-05-21 |
| D660389 | Iron-type golf club | Chris Voshall, Richard Delvac | 2012-05-22 |
| D618295 | Fairway wood-type golf club head | David Llewellyn, Tetsuya Kanayama | 2010-06-22 |
| D617859 | Hybrid golf club head | David Llewellyn, Kei Tsuji | 2010-06-15 |
| D617403 | Driver-type golf club head | David Llewellyn, Tsugunobo Sakamoto, Tetsuya Kanayama | 2010-06-08 |
| D603923 | Back design for an iron golf club head | David Llewellyn, Kazuhiro Doi | 2009-11-10 |
| D552703 | Perimeter-weighted back portion with an integrated trapezoidal weight portion for an iron golf club | Motokaka Iwata, Isamu Toshinari, Tomomi Watanabe, Kiyotaka Chaen | 2007-10-09 |
| D547817 | Perimeter-weighted golf club back with integrated trapezoidal weight | Mototaka Iwata, Isamu Toshinari, Tomomi Watanabe, Kiyotaka Chaen | 2007-07-31 |
| 7131913 | Iron golf club and golf club set | Mototaka Iwata, Isamu Toshinari, Tomomi Watanabe, Kiyotaka Chaen | 2006-11-07 |
| 7022028 | Iron golf club and golf club set with variable weight distribution | Masao Nagai, David Llewellyn, Harry B. Taylor, Isamu Toshinari | 2006-04-04 |
| D508722 | Golf club iron head | Mototaka Iwata, Isamu Toshinari, Tomomi Watanabe, Kiyotaka Chaen | 2005-08-23 |
| D504167 | Weight portion for a golf club iron head | Mototaka Iwata, Isamu Toshinari, Tomomi Watanabe, Kiyotaka Chaen | 2005-04-19 |
| 6843733 | Cavity back golf club having a multi-tiered weight distribution configuration | David Llewellyn, Harry B. Taylor | 2005-01-18 |
| 6709345 | Iron golf club and golf club set | Mototaka Iwata, Isamu Toshinari, Tomomi Watanabe | 2004-03-23 |
| D473904 | Recessed back of a golf club head | David Llewellyn, Harry B. Taylor | 2003-04-29 |
| D469834 | Golf club head | — | 2003-02-04 |
| D467292 | Golf club head | Keiji Hashimoto, Koji Kawase | 2002-12-17 |