Granted Patent
Utility
US 4,842,919 · App. 07/010,213
Pad forming method
Inventors:
John R. David, Daniel Pohl
Patented Case
View Patent ↗
Granted: Jun 27, 1989
Filed: Feb 3, 1987
Inventors
John R. David
Daniel Pohl
Assignee (at issue)
Minnesota Mining and Manufacturing Company
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.