Granted Patent
Utility
US 4,595,921 · App. 06/522,202
Method of polling to ascertain service needs
Inventors:
An Wang, Gary N. Stapleford, Richard W. Neiss
Patented Case
View Patent ↗
Granted: Jun 17, 1986
Filed: Aug 11, 1983
Inventors
An Wang
Gary N. Stapleford
Richard W. Neiss
Assignee (at issue)
Wang Laboratories, 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.