Granted Patent
Utility
US 4,684,247 · App. 06/788,989
Target member for use in a positioning system
Inventor:
Harry B. Hammill, III
Patented Case
View Patent ↗
Granted: Aug 4, 1987
Filed: Oct 18, 1985
Inventor
Harry B. Hammill, III
Assignee (at issue)
Calspan 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.