Granted Patent
Utility
US 4,099,869 · App. 05/750,084
Printing head assembly
Inventor:
John W. Lang
Patented Case
View Patent ↗
Granted: Jul 11, 1978
Filed: Dec 13, 1976
Inventor
John W. Lang
Assignee (at issue)
Bell and Howell, LLC
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.