Granted Patent
Utility
US 4,285,146 · App. 06/042,971
Tamper-resistant identification device
Inventors:
Stanley E. Charles, Donald A. Long, Arthur H. Schimmelman
Patented Case
View Patent ↗
Granted: Aug 25, 1981
Filed: May 29, 1979
Inventors
Stanley E. Charles
Donald A. Long
Arthur H. Schimmelman
Assignee (at issue)
Precision Dynamics Corporation
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.