Granted Patent
Utility
US 4,396,457 · App. 06/359,040
Method of making bumped-beam tape
Inventor:
Frank C. Bakermans
Patented Case
View Patent ↗
Granted: Aug 2, 1983
Filed: Mar 17, 1982
Inventor
Frank C. Bakermans
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND 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.