Inventor · Tyler, TX, US

Joseph A. Pietsch

9Patents
7h-index
4Co-inventors
56Inventor score

Filing activity: Nov 2, 1977 → Apr 30, 2001

Most-cited inventions

PatentTitleAreaCited byStatus
US4336692A Dual source heat pump Emerging Cross-Sectional Technologies 66 Expired
US5964101A Energy transfer system for refrigerator/freezer components Emerging Cross-Sectional Technologies 27 Expired
US4320630A Heat pump water heater Mechanical Engineering; Lighting; Heating 20 Expired
US4138859A Split heat pump outdoor fan arrangement Emerging Cross-Sectional Technologies 11 Expired
US6230514A Energy transfer system for refrigerator freezer components Emerging Cross-Sectional Technologies 10 Expired
US6463755B2 Energy transfer system for refrigerator/freezer components Emerging Cross-Sectional Technologies 10 Expired
US5816063A Energy transfer system for refrigerator/freezer components Mechanical Engineering; Lighting; Heating 9 Expired
US5937662A Energy transfer system for refrigerator/freezer components Mechanical Engineering; Lighting; Heating 6 Expired
US5904051A Energy transfer system for refrigeration/freezer components Mechanical Engineering; Lighting; Heating 1 Expired

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.