Granted Patent
Utility
US 6,688,178 · App. 10/085,276
Roller transducer apparatus
Inventors:
Gerald SCHMIDT, John R. Hollenbeck
Patented Case
View Patent ↗
Granted: Feb 10, 2004
Filed: Feb 28, 2002
Inventors
Gerald SCHMIDT
John R. Hollenbeck
Assignee (at issue)
Materials Systems, 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.