Granted Patent
Utility
US 4,258,577 · App. 06/014,531
Gyroscopic apparatus
Inventors:
Colin Fox, James S. Burdess
Patented Case
View Patent ↗
Granted: Mar 31, 1981
Filed: Feb 23, 1979
Inventors
Colin Fox
James S. Burdess
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT 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.