Granted Patent
Utility
US 5,578,383 · App. 08/421,157
Precious-metal material for articles of jewelry and a method of manufacturing them
Inventors:
Hans-Hermann Beyer, Karl-Anton Starz
Patented Case
View Patent ↗
Granted: Nov 26, 1996
Filed: Apr 10, 1995
Inventors
Hans-Hermann Beyer
Karl-Anton Starz
Assignee (at issue)
Degussa AG
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.