Granted Patent
Utility
US 4,983,809 · App. 07/388,019
Radiant floor tile heater
Inventors:
Ralph L. Maiette, Stephen T. Starre, Dayton C. Thomas, Craig E. Crandall
Patented Case
View Patent ↗
Granted: Jan 8, 1991
Filed: Aug 1, 1989
Inventors
Ralph L. Maiette
Stephen T. Starre
Dayton C. Thomas
Craig E. Crandall
Assignee (at issue)
UAS Automation Systems, Inc.
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.