Granted Patent
Utility
US 4,319,849 · App. 06/106,613
Print hammer for high speed impact printer
Inventor:
William L. Dollenmayer
Patented Case
View Patent ↗
Granted: Mar 16, 1982
Filed: Dec 26, 1979
Inventor
William L. Dollenmayer
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.