Assignee
HALSTEAD IND INC
5 granted patents·187 citations·filing 1976–1985
Top patents by PatentIndex Score
5 records- 0192US4197716ARefrigeration system with auxiliary heat exchanger for supplying heat during defrost cycle and for subcooling the refrigerant during a refrigeration cycleHALSTEAD IND INC·Filed 1978·Granted Apr 15, 1980·75 cites·10 claims
- 0281US4363218AHeat pump using solar and outdoor air heat sourcesHALSTEAD IND INC·Filed 1981·Granted Dec 14, 1982·39 cites·10 claims
- 0379USD300404STelescopically extendable, multiple-element hole cutterHALSTEAD IND INC·Filed 1985·Granted Mar 28, 1989·33 cites·1 claims
- 0467US4064868ASolar heat collectorHALSTEAD IND INC·Filed 1976·Granted Dec 27, 1977·30 cites·12 claims
- 0546US4546818AMultiple source energy recovery systemHALSTEAD IND INC·Filed 1982·Granted Oct 15, 1985·10 cites·5 claims
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