David A. Ward
19Patents
9h-index
39Co-inventors
72Inventor score
Filing activity: Jun 3, 1998 → Dec 17, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6155678A | Replaceable ink cartridge for ink jet pen | Performing Operations; Transporting | 147 | Expired |
| US6687721B1 | Random number generator with entropy accumulation | Physics | 58 | Expired |
| US6247779A | Printhead configuration | Performing Operations; Transporting | 26 | Expired |
| US6796646B2 | Replaceable ink cartridge for ink jet pen | Performing Operations; Transporting | 23 | Expired |
| US6270211A | Bubble elimination and filter tower structure | Performing Operations; Transporting | 21 | Expired |
| US6398354B1 | Printhead apparatus and printer having separate filtration device and method for attaching said device | Performing Operations; Transporting | 14 | Expired |
| US6692107B2 | Ink cartridge body and carrier assembly | Performing Operations; Transporting | 13 | Expired |
| US6728893B1 | Power management system for a random number generator | Electricity | 12 | Expired |
| US6820959B1 | Ink jet cartridge structure | Performing Operations; Transporting | 12 | Expired |
| US6643374B1 | Duty cycle corrector for a random number generator | Electricity | 9 | Expired |
| USD962160S1 | Battery charger for a thermal imager | General | 7 | Active |
| US8066363B2 | Printhead filter systems and methods for manufacturing the same | Performing Operations; Transporting | 4 | Expired |
| US8398501B2 | Muscle training apparatus and method | Human Necessities | 3 | Active |
| USD972619S1 | Thermal imager | General | 3 | Active |
| US10827244B1 | Breathing tube adapter for a respirator with an internal speaker | Electricity | 3 | Active |
| US8827843B2 | Muscle training apparatus and method | Human Necessities | 3 | Active |
| US9149705B2 | Multi-rotor apparatus and method for motion sculpting | Human Necessities | 2 | Active |
| US7399064B2 | Ink jetting assembly | Performing Operations; Transporting | 1 | Active |
| US9981173B2 | Multi-rotor apparatus and method for motion sculpting | Human Necessities | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.