Hoffman Controls Corp.
Records under this name other than patents Hoffman Controls Corp. holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.
Showing 1 to 8 of 8 · Back to Hoffman Controls Corp.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,191,826 | Variable speed fan motor control for forced air heating/cooling system Term ended Ended no later than Feb 18, 2017 · From the USPTO record | Term ended | Ended no later than Feb 18, 2017 | From the USPTO record |
| US 6,695,046 | Variable speed fan motor control for forced air heating/cooling system Lapsed on the fee record Ended Feb 24, 2016 · From the USPTO record | Lapsed on the fee record | Ended Feb 24, 2016 | From the USPTO record |
| US 6,684,944 | Variable speed fan motor control for forced air heating/cooling system Lapsed on the fee record Ended Feb 3, 2016 · From the USPTO record | Lapsed on the fee record | Ended Feb 3, 2016 | From the USPTO record |
| US 6,070,660 | Variable speed fan motor control for forced air heating/cooling system Lapsed on the fee record Ended Jun 6, 2012 · From the USPTO record | Lapsed on the fee record | Ended Jun 6, 2012 | From the USPTO record |
| US 7,248,015 | Variable speed motor control circuit Lapsed on the fee record Ended Jul 24, 2011 · From the USPTO record | Lapsed on the fee record | Ended Jul 24, 2011 | From the USPTO record |
| US 4,413,514 | Air flow sensor Term ended Term ended no later than Nov 8, 2003 · Low confidence | Term ended | Term ended no later than Nov 8, 2003 | Low confidence |
| US 4,422,571 | Proportional motor drive control Term ended Term ended no later than Dec 27, 2003 · Low confidence | Term ended | Term ended no later than Dec 27, 2003 | Low confidence |
| US 4,607,789 | Proportional motor drive control Term ended Term ended no later than Aug 26, 2006 · Low confidence | Term ended | Term ended no later than Aug 26, 2006 | Low confidence |