Robert A. Walker
49Patents
20h-index
44Co-inventors
85Inventor score
Filing activity: Mar 18, 1976 → Feb 20, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5170352A | Multi-purpose autonomous vehicle with path plotting | Physics | 334 | Expired |
| US4890344A | Air control system for air bed | Emerging Cross-Sectional Technologies | 253 | Expired |
| US4897890A | Air control system for air bed | Emerging Cross-Sectional Technologies | 253 | Expired |
| US4766628A | Air mattress with filler check valve and cap therefor | Emerging Cross-Sectional Technologies | 252 | Expired |
| US5170522A | Air adjustable bed | Emerging Cross-Sectional Technologies | 252 | Expired |
| US4829616A | Air control system for air bed | Emerging Cross-Sectional Technologies | 244 | Expired |
| US4908895A | Air mattress | Human Necessities | 242 | Expired |
| US4991244A | Border for air bed | Human Necessities | 237 | Expired |
| US4788729A | Air mattress with audible pressure relief valve | Emerging Cross-Sectional Technologies | 194 | Expired |
| US5144706A | Bed foundation | Emerging Cross-Sectional Technologies | 177 | Expired |
| USD313973S | Hand-held control unit for the operation of an inflatable air mattress | General | 149 | Expired |
| US4644597A | Air mattress with pressure relief valve | Human Necessities | 141 | Expired |
| USD300194S | Air mattress | General | 139 | Expired |
| US4269607A | Air-oil separator and method of separation | Emerging Cross-Sectional Technologies | 58 | Expired |
| US5479907A | Combination in-line air-filter/air-oil separator/air-silencer with preseparator | Emerging Cross-Sectional Technologies | 47 | Expired |
| US4184858A | Engine emission control device | Emerging Cross-Sectional Technologies | 33 | Expired |
| US5140957A | Combination in line air-filter/air-oil separator/air-silencer | Emerging Cross-Sectional Technologies | 30 | Expired |
| US4724807A | In-line air-oil separator | Mechanical Engineering; Lighting; Heating | 28 | Expired |
| US6422224B1 | Remote air-oil separator | Mechanical Engineering; Lighting; Heating | 27 | Expired |
| US5347973A | Vacuum relief valve | Emerging Cross-Sectional Technologies | 22 | Expired |
| US6009846A | Combination air-filter/air-oil separator with integral vacuum regulator | Emerging Cross-Sectional Technologies | 20 | Expired |
| US6475255B1 | Serviceable air filter/oil separator assembly | Emerging Cross-Sectional Technologies | 19 | Expired |
| US4026479A | Method and system for maintaining optimum throughput in a grinding circuit | Performing Operations; Transporting | 15 | Expired |
| US6726738B1 | Air filter assembly | Performing Operations; Transporting | 11 | Expired |
| US4373689A | Two-axis rudder trim for aircraft | Performing Operations; Transporting | 10 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.