Granted Patent
Utility
US 4,158,919 · App. 05/779,554
Apparatus for measuring displacement in at least two orthogonal dimensions
Inventor:
David R. McMurtry
Patented Case
View Patent ↗
Granted: Jun 26, 1979
Filed: Mar 21, 1977
Inventor
David R. McMurtry
Assignees (at issue)
Rolls-Royce Corporation
Renishaw Electrical Limited
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.