Granted Patent
Utility
US 4,042,013 · App. 05/661,619
Method and apparatus for controlling air-conditioning systems
Inventors:
Merlin E. Demaray, Russell G. Attridge, Jr.
Patented Case
View Patent ↗
Granted: Aug 16, 1977
Filed: Feb 26, 1976
Inventors
Merlin E. Demaray
Russell G. Attridge, Jr.
Assignee (at issue)
RANCO CO., Ltd.
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.