Keystone Engineering & MFG. LLC
Records under this name other than the patents Keystone Engineering & MFG. LLC holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned. None of them is counted in the 11 patents it holds.
Showing 1 to 2 of 2 · Back to Keystone Engineering & MFG. LLC
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,108,212 | Angular tool and holding block Term ended Term ended Jun 14, 2024 · From the USPTO record | Term ended | Term ended Jun 14, 2024 | From the USPTO record |
| US 7,290,726 | Angular cutting tool Term ended Term ended Nov 11, 2023 · From the USPTO record | Term ended | Term ended Nov 11, 2023 | From the USPTO record |