Granted Patent
Utility
US 5,073,136 · App. 07/501,051
Collapsible sonobuoy floatation device
Inventors:
Paul DeWitt, James J. Majewski, Thomas Richter
Patented Case
View Patent ↗
Granted: Dec 17, 1991
Filed: Mar 29, 1990
Inventors
Paul DeWitt
James J. Majewski
Thomas Richter
Assignee (at issue)
Magnavox Government and Industrial Electronics 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.