Granted Patent
Utility
US 4,809,752 · App. 07/044,838
Thread protector for screw threads, made of a deformable material with a complementary thread
Inventor:
Wilhelm Strodter
Patented Case
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Granted: Mar 7, 1989
Filed: Apr 30, 1987
Inventor
Wilhelm Strodter
Assignee (at issue)
Wilhelm Strodter Maschinen- und Apparatebau
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.