Granted Patent
Utility
US 4,232,480 · App. 06/038,500
Method and device for coloring bulk hydro mulch fibers
Inventor:
Otis R. Videen
Patented Case
View Patent ↗
Granted: Nov 11, 1980
Filed: May 14, 1979
Inventor
Otis R. Videen
Assignee (at issue)
Conwed Corporation
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.