William H. Ward
32Patents
17h-index
16Co-inventors
78Inventor score
Filing activity: Apr 14, 1977 → Oct 3, 2011
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6122996A | Hydrostatic transmission | Emerging Cross-Sectional Technologies | 102 | Expired |
| US5125518A | Interlocking hanging system | Performing Operations; Transporting | 80 | Expired |
| US6307468A | Impedance matching network and multidimensional electromagnetic field coil for a transponder interrogator | Physics | 77 | Expired |
| US5992141A | Ammonia injection in NOx control | Emerging Cross-Sectional Technologies | 72 | Expired |
| US6775976B1 | Zero-turn hydrostatic transaxle | Performing Operations; Transporting | 70 | Expired |
| US5358209A | Anchoring device | Fixed Constructions | 70 | Expired |
| US6494686B1 | Tandem pump and interface for same | Mechanical Engineering; Lighting; Heating | 57 | Expired |
| US7347379B2 | Dual antenna coil transponder system | Electricity | 37 | Expired |
| US4341929A | Memory accessing system | Electricity | 36 | Expired |
| US4231488A | Container closure spout construction and method of forming same | Performing Operations; Transporting | 34 | Expired |
| US4111336A | Weight loss control system | Physics | 32 | Expired |
| US7760463B2 | Multiple disks in a single disk package | Physics | 32 | Active |
| US6253637A | Control device for hydrostatic apparatus | Emerging Cross-Sectional Technologies | 26 | Expired |
| US6843747B1 | Internal expansion tank for hydrostatic transaxle | Emerging Cross-Sectional Technologies | 25 | Expired |
| US8418452B1 | Hydrostatic transaxle | Performing Operations; Transporting | 20 | Active |
| US5690182A | Apparatus facilitating connection of trailer implement to tractor three-point hitch system | Performing Operations; Transporting | 18 | Expired |
| US6935454B1 | Valve for a hydraulic drive apparatus | Performing Operations; Transporting | 18 | Expired |
| US6682312B1 | Tandem pump and interface for same | Mechanical Engineering; Lighting; Heating | 15 | Expired |
| US6971234B1 | Zero-turn hydrostatic transaxle | Performing Operations; Transporting | 11 | Expired |
| US7052429B1 | Internal expansion tank for hydrostatic transaxle | Emerging Cross-Sectional Technologies | 10 | Expired |
| US6943680B2 | Identification system interrogator | Physics | 9 | Expired |
| US6968684B1 | Valve for a hydraulic drive apparatus | Performing Operations; Transporting | 8 | Expired |
| US6793463B1 | Tandem pump and interface for same | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US4307398A | Tracking filter for use in hand held radar device | Electricity | 6 | Expired |
| US7145451B2 | Impedance matching network and multidimensional electromagnetic field coil for a transponder interrogator | Physics | 6 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.