Granted Patent
Utility
US 4,822,983 · App. 06/938,659
Electrical heaters
Inventors:
Robert J. Bremner, Hugh Duffy, Burton E. Miller
Patented Case
View Patent ↗
Granted: Apr 18, 1989
Filed: Dec 5, 1986
Inventors
Robert J. Bremner
Hugh Duffy
Burton E. Miller
Assignee (at issue)
Raychem Limited
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.