Granted Patent
Utility
US 4,241,270 · App. 05/864,395
Synchronous electric motor
Inventors:
Arthur W. Haydon, John J. Dean
Patented Case
View Patent ↗
Granted: Dec 23, 1980
Filed: Dec 27, 1977
Inventors
Arthur W. Haydon
John J. Dean
Assignee (at issue)
TRI-TECH CORPORATION
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.