Granted Patent
Utility
US 5,024,031 · App. 07/505,804
Radial expansion/retraction truss structures
Inventor:
Charles Hoberman
Patented Case
View Patent ↗
Granted: Jun 18, 1991
Filed: Apr 6, 1990
Inventor
Charles Hoberman
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.