Granted Patent
Utility
US 4,564,247 · App. 06/558,918
Roller-bearing-mounted telescopic track for drawers or the like
Inventor:
Franz-Josef Knoop
Patented Case
View Patent ↗
Granted: Jan 14, 1986
Filed: Dec 7, 1983
Inventor
Franz-Josef Knoop
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.