Individual holder
BUTLER ROBERT F
US·2 granted patents·21 citations·filing 1983–1983
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
2 records- 0152US4513734AHigh efficiency flat plate solar energy collectorBUTLER ROBERT F·Filed 1983·Granted Apr 30, 1985·16 cites·5 claims
- 0232US4524759AProcess for the reversible transfer of thermal energy and heat transfer system useful thereinBUTLER ROBERT F·Filed 1983·Granted Jun 25, 1985·5 cites·21 claims
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