Walker Manufacturing
15Patents
2Active
15Granted
35Portfolio score
Filing activity: Sep 2, 1975 → Sep 18, 2012
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4589249A | Mowing apparatus | Human Necessities | 71 | Expired |
| USD275988S | Ceiling air diffuser or the like | General | 60 | Expired |
| US4835951A | Mower apparatus | Human Necessities | 57 | Expired |
| US4782650A | Mowing apparatus | Human Necessities | 46 | Expired |
| US4781665A | Power-delivery belt-tensioning system | Mechanical Engineering; Lighting; Heating | 28 | Expired |
| US6935446B2 | Walk behind mower | Human Necessities | 14 | Expired |
| US4094935A | Evaporative cooling system | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4930981A | Low noise impeller | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US7146787B2 | Walk behind mower | Human Necessities | 13 | Expired |
| USD242813S | Livestock feed bunk | General | 8 | Expired |
| USD422163S | Point-of-purchase display stand | General | 7 | Expired |
| US4386038A | Evaporative cooler apparatus | Emerging Cross-Sectional Technologies | 7 | Expired |
| US7325389B2 | High-clearance dump system with independent tilt control | Human Necessities | 5 | Expired |
| US9032701B2 | Grass collection system with through-shaft PTO | Human Necessities | 4 | Active |
| US8485908B2 | Flexible coupler | Mechanical Engineering; Lighting; Heating | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.