Granted Patent
Utility
US 4,544,211 · App. 06/556,530
Recirculating bearing assembly and method of making
Inventors:
Ki C. Kwon, Thomas A. Luther
Patented Case
View Patent ↗
Granted: Oct 1, 1985
Filed: Nov 30, 1983
Inventors
Ki C. Kwon
Thomas A. Luther
Assignee (at issue)
Warner & Swasey
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.