Granted Patent
Utility
US 4,272,638 · App. 06/021,051
Heater element supports for use with fibrous block insulations
Inventor:
Anthony E. Cimochowski
Patented Case
View Patent ↗
Granted: Jun 9, 1981
Filed: Mar 16, 1979
Inventor
Anthony E. Cimochowski
Assignee (at issue)
Johns Manville
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.