Granted Patent
Utility
US 4,131,040 · App. 05/851,091
Printing blanket hole forming apparatus and method
Inventor:
Jacob A. Bollmer
Patented Case
View Patent ↗
Granted: Dec 26, 1978
Filed: Nov 14, 1977
Inventor
Jacob A. Bollmer
Assignee (at issue)
DayCo Holdings, LP
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.