Granted Patent
Utility
US 4,588,923 · App. 06/489,983
High efficiency tubular heat lamps
Inventors:
Leonard E. Hoegler, Lee W. Otto
Patented Case
View Patent ↗
Granted: May 13, 1986
Filed: Apr 29, 1983
Inventors
Leonard E. Hoegler
Lee W. Otto
Assignee (at issue)
General Electric Company
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.