Assignee
GARY FRED J
3 granted patents·22 citations·filing 1978–1979
Top patents by PatentIndex Score
3 records- 0159US4176787AHeat recovery device for use in return air duct of forced air furnaceGARY FRED J·Filed 1978·Granted Dec 4, 1979·12 cites·12 claims
- 0239US4267884AHeat recovery device for use in return air duct of forced air furnace for recovering heat from the flue of such furnaceGARY FRED J·Filed 1979·Granted May 19, 1981·6 cites·7 claims
- 0328US4232654AHeat recovery device for use in return air duct of forced air furnace for recovering heat from the flue of such furnaceGARY FRED J·Filed 1979·Granted Nov 11, 1980·4 cites·2 claims
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