Douglas E. Roberts
154Patents
34h-index
82Co-inventors
93Inventor score
Filing activity: Mar 20, 1997 → Oct 20, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| USD469833S1 | Iron-type golf club head | General | 269 | Expired |
| USD508545S1 | Golf club head | General | 250 | Expired |
| US8827832B2 | Golf club heads with enlarged grooves | Human Necessities | 248 | Active |
| USD523917S1 | Iron-type golf club head | General | 180 | Expired |
| USD516650S1 | Iron-type golf club head | General | 172 | Expired |
| USD507320S1 | Wedge-type golf club head | General | 161 | Expired |
| USD580504S1 | Club head | General | 129 | Expired |
| USD591818S1 | Golf club head | General | 106 | Expired |
| US8105175B2 | Golf club having removable sole weight using custom and interchangeable panels | Human Necessities | 80 | Active |
| US7553241B2 | Set of golf clubs | Human Necessities | 78 | Active |
| US7563176B2 | Muscle back, with insert, iron type golf club head | Human Necessities | 78 | Active |
| US7500926B2 | Golf club head | Electricity | 72 | Active |
| US8092316B2 | Golf club having removable sole weight using custom and interchangeable panels | Human Necessities | 64 | Active |
| USD618751S1 | Golf club head sole | General | 64 | Expired |
| USD592723S1 | Golf club head | General | 61 | Expired |
| US8771097B2 | Golf club with trough in sole | Human Necessities | 61 | Active |
| US7871336B2 | Golf club having removable sole weight using custom and interchangeable panels | Human Necessities | 58 | Active |
| USD508273S1 | Golf putter club head | General | 57 | Expired |
| US8251834B2 | Golf club head with improved performance | Human Necessities | 57 | Active |
| US7789771B2 | Golf club head | Emerging Cross-Sectional Technologies | 56 | Active |
| USD684230S1 | Golf club head | General | 56 | Active |
| USD667516S1 | Golf club head | General | 56 | Active |
| USD665863S1 | Golf club head | General | 55 | Active |
| US7390270B2 | Muscle-back, with insert, iron type golf club head | Human Necessities | 51 | Expired |
| US7789773B2 | Golf club head | Electricity | 50 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.