Granted Patent
Utility
US 4,242,645 · App. 05/780,062
Gas laser systems
Inventors:
Klaus J. Siemsen, John Reid
Patented Case
View Patent ↗
Granted: Dec 30, 1980
Filed: Mar 22, 1977
Inventors
Klaus J. Siemsen
John Reid
Assignee (at issue)
Canadian Patents and Development 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.