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Patent applications and USPTO patent grants for Krump; Robert C..The latest application filed is for "charging circuit for battery in thermostat with battery operated timer".
Patent | Date |
---|---|
Charging circuit for battery in thermostat with battery operated timer Grant 4,249,696 - Donnelly , et al. February 10, 1 | 1981-02-10 |
Battery operated thermostat timer with battery charging circuits Grant 4,215,815 - Krump August 5, 1 | 1980-08-05 |
Battery operated thermostat timer with battery charging circuits Grant 4,177,923 - Krump December 11, 1 | 1979-12-11 |
Timer controlled space thermostat with battery operated timer Grant 4,054,245 - Bennetsen , et al. October 18, 1 | 1977-10-18 |
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