David Llewellyn
68Patents
24h-index
29Co-inventors
88Inventor score
Filing activity: Jul 30, 1999 → Jun 3, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7611424B2 | Golf club head and golf club | Human Necessities | 556 | Active |
| US8016694B2 | Golf club head and golf clubs | Human Necessities | 257 | Active |
| USD579507S1 | Crown for a hybrid golf club | General | 126 | Expired |
| USD428634S | Recessed back portion of a golf club head | General | 113 | Expired |
| USD561284S1 | Golf club wood head | General | 111 | Expired |
| USD428635S | Recessed back portion of a golf club head | General | 103 | Expired |
| USD461865S1 | Sole for a golf club wood | General | 101 | Expired |
| USD564611S1 | Golf club wood head | General | 88 | Expired |
| US7022028B2 | Iron golf club and golf club set with variable weight distribution | Human Necessities | 70 | Expired |
| USD466961S1 | Back of a golf club head | General | 68 | Expired |
| USD669546S1 | Wood-type golf club | General | 61 | Active |
| US7126339B2 | Utility iron golf club with weighting element | Human Necessities | 54 | Expired |
| US6855069B2 | Game improvement golf club using hollow technology | Human Necessities | 50 | Expired |
| USD466576S1 | Rear inset of a golf club head | General | 45 | Expired |
| USD550316S1 | Recessed back portion of a golf iron | General | 39 | Expired |
| USD617403S1 | Driver-type golf club head | General | 38 | Expired |
| USD446567S | Sole portion for a golf club head | General | 36 | Expired |
| USD617858S1 | Driver-type golf club head | General | 32 | Expired |
| US9597563B2 | Multi-track adjustable golf club | Human Necessities | 30 | Active |
| USD549295S1 | Recessed back portion of a golf iron | General | 27 | Expired |
| USD659780S1 | Iron-type golf club | General | 26 | Expired |
| USD619184S1 | Back design for iron golf club heads | General | 26 | Expired |
| US6416422B1 | Golf club head with bounce channel | Human Necessities | 26 | Expired |
| USD619183S1 | Back design for iron golf club heads | General | 26 | Expired |
| USD720026S1 | Iron-type golf club head | General | 24 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.