Granted Patent
Utility
US 5,333,817 · App. 08/155,363
Ballonet system for a lighter-than-air vehicle
Inventors:
John B. Kalisz, Mark H. Wexler
Patented Case
View Patent ↗
Granted: Aug 2, 1994
Filed: Nov 22, 1993
Inventors
John B. Kalisz
Mark H. Wexler
Assignee (at issue)
Lockheed Corporation
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.