Granted Patent
Utility
US 4,309,593 · App. 06/112,233
Electric heater which reduces the chance of electrical shock
Inventors:
Darrell B. Jones, William B. Kircher
Patented Case
View Patent ↗
Granted: Jan 5, 1982
Filed: Jan 15, 1980
Inventors
Darrell B. Jones
William B. Kircher
Assignee (at issue)
Rival Manufacturing 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.