Granted Patent
Utility
US 5,259,859 · App. 07/939,325
Lightweight vacuum shuttle
Inventors:
George R. Claassen, James H. Schwartz, Thomas L. Waterloo, Richard V. Posney
Patented Case
View Patent ↗
Granted: Nov 9, 1993
Filed: Sep 2, 1992
Inventors
George R. Claassen
James H. Schwartz
Thomas L. Waterloo
Richard V. Posney
Assignee (at issue)
PPG Industries, 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.