Granted Patent
Utility
US 5,031,690 · App. 07/382,995
Portable unitary aircraft air conditioner and heater
Inventors:
Gordon K. Anderson, Robert Y. Woo
Patented Case
View Patent ↗
Granted: Jul 16, 1991
Filed: Jul 21, 1989
Inventors
Gordon K. Anderson
Robert Y. Woo
Assignee (at issue)
BFM Transport Dynamics Corp.
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.