Granted Patent
Utility
US 5,149,255 · App. 07/768,196
Gearing system having interdigital concave-convex teeth formed as invalutes or multi-faceted polygons
Inventor:
Neils O. Young
Patented Case
View Patent ↗
Granted: Sep 22, 1992
Filed: Oct 25, 1991
Inventor
Neils O. Young
Assignee (at issue)
Arthur D. Little, Inc.
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.