Granted Patent
Utility
US 4,256,989 · App. 05/944,725
Incandescent lamp with filament mounting means and socket adaptor
Inventors:
Donald G. Trutner, David Kovacs, Raymond Fontana, Luke Thorington
Patented Case
View Patent ↗
Granted: Mar 17, 1981
Filed: Sep 22, 1978
Inventors
Donald G. Trutner
David Kovacs
Raymond Fontana
Luke Thorington
Assignee (at issue)
Duro-Test Corporation
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.