Granted Patent
Utility
US 4,879,794 · App. 07/272,945
Method of making shock absorbing wheels
Inventor:
Tobin Djerf
Patented Case
View Patent ↗
Granted: Nov 14, 1989
Filed: Jan 3, 1989
Inventor
Tobin Djerf
Assignee (at issue)
Unarco Industries LLC
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.