Granted Patent
Utility
US 4,212,552 · App. 05/958,276
Impact printer cardholder with integral ribbon guide and end of ribbon sensor
Inventors:
John D. Bemis, Willie Goff, Jr.
Patented Case
View Patent ↗
Granted: Jul 15, 1980
Filed: Nov 6, 1978
Inventors
John D. Bemis
Willie Goff, Jr.
Assignee (at issue)
International Business Machines 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.