Granted Patent
Utility
US 6,086,038 · App. 09/192,986
Linkage locking device
Inventor:
Weijian Ma
Patented Case
View Patent ↗
Granted: Jul 11, 2000
Filed: Nov 16, 1998
Inventor
Weijian Ma
Assignee (at issue)
Young & Franklin, 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.