Granted Patent
Utility
US 4,533,093 · App. 06/556,545
Tape cassette dust door spring assembly and method for assembling same
Inventors:
Paul J. Gelardi, Robert B. MacLeod, Jr.
Patented Case
View Patent ↗
Granted: Aug 6, 1985
Filed: Nov 30, 1983
Inventors
Paul J. Gelardi
Robert B. MacLeod, Jr.
Assignee (at issue)
Shape 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.