Walker Manufacturing
Records under this name other than patents Walker Manufacturing holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,325,389 | High-clearance dump system with independent tilt control Term ended Term ended May 19, 2026 · From the USPTO record | Term ended | Term ended May 19, 2026 | From the USPTO record |
| US 8,485,908 | Flexible coupler Lapsed on the fee record Ended Jul 16, 2025 · From the USPTO record | Lapsed on the fee record | Ended Jul 16, 2025 | From the USPTO record |
| US 9,032,701 | Grass collection system with through-shaft PTO Lapsed on the fee record Ended May 19, 2023 · From the USPTO record | Lapsed on the fee record | Ended May 19, 2023 | From the USPTO record |
| US 7,146,787 | Walk behind mower Lapsed on the fee record Ended Dec 12, 2014 · From the USPTO record | Lapsed on the fee record | Ended Dec 12, 2014 | From the USPTO record |
| US D422,163 | Point-of-purchase display stand Term ended Term ended Apr 4, 2014 · From the USPTO record | Term ended | Term ended Apr 4, 2014 | From the USPTO record |
| US 6,935,446 | Walk behind mower Lapsed on the fee record Ended Aug 30, 2013 · From the USPTO record | Lapsed on the fee record | Ended Aug 30, 2013 | From the USPTO record |
| US 4,094,935 | Evaporative cooling system Term ended Term ended no later than Jun 13, 1998 · Low confidence | Term ended | Term ended no later than Jun 13, 1998 | Low confidence |
| US 4,386,038 | Evaporative cooler apparatus Formerly held Term ended Term ended no later than May 31, 2003 · Low confidence | Term ended | Term ended no later than May 31, 2003 | Low confidence |
| US 4,589,249 | Mowing apparatus Term ended Term ended no later than May 20, 2006 · Low confidence | Term ended | Term ended no later than May 20, 2006 | Low confidence |
| US 4,781,665 | Power-delivery belt-tensioning system Term ended Term ended no later than Nov 1, 2008 · Low confidence | Term ended | Term ended no later than Nov 1, 2008 | Low confidence |