Granted Patent
Utility
US 5,151,728 · App. 07/739,320
6-bar erecting system
Inventors:
Donald H. Hendry, Bruce K. Johnson, Joanne M. Krawczyk, Bruce C. Vierstra
Patented Case
View Patent ↗
Granted: Sep 29, 1992
Filed: Aug 1, 1991
Inventors
Donald H. Hendry
Bruce K. Johnson
Joanne M. Krawczyk
Bruce C. Vierstra
Assignee (at issue)
Polaroid 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.