Tractech, Inc.
Records under this name other than the patents Tractech, Inc. 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 2 patents it holds.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,874,954 | Locking Differential Including Resilient Disc Means Formerly held In force · High confidence | In force | High confidence | |
| US 7,311,632 | Gearless locking differential Term ended Term ended Jan 13, 2026 · From the USPTO record | Term ended | Term ended Jan 13, 2026 | From the USPTO record |
| US 6,826,981 | Differential for racing cars Term ended Term ended Aug 14, 2023 · From the USPTO record | Term ended | Term ended Aug 14, 2023 | From the USPTO record |
| US 6,688,194 | Locking Differential Including Improved Clutch Member and Adapter Sleeve Term ended Term ended Oct 4, 2021 · High confidence | Term ended | Term ended Oct 4, 2021 | High confidence |
| US 6,309,321 | Fully-locking torque-proportioning differential Term ended Term ended Aug 11, 2020 · From the USPTO record | Term ended | Term ended Aug 11, 2020 | From the USPTO record |
| US 6,374,701 | Gearless differential Term ended Term ended Oct 22, 2019 · From the USPTO record | Term ended | Term ended Oct 22, 2019 | From the USPTO record |
| US 6,076,429 | Clutch for a differential Term ended Term ended Mar 4, 2019 · From the USPTO record | Term ended | Term ended Mar 4, 2019 | From the USPTO record |
| US 7,871,350 | Differential Holdout Ring Arrangement Formerly held Lapsed on the fee record Ended Jan 18, 2015 · High confidence | Lapsed on the fee record | Ended Jan 18, 2015 | High confidence |
| US 6,209,700 | Electric clutch including resilient disk biasing means Lapsed on the fee record Ended Apr 3, 2013 · From the USPTO record | Lapsed on the fee record | Ended Apr 3, 2013 | From the USPTO record |
| US 4,254,854 | Centrifugal clutch shoe mounting arrangement Formerly held Term ended Term ended no later than Mar 10, 2001 · Low confidence | Term ended | Term ended no later than Mar 10, 2001 | Low confidence |