Granted Patent
Utility
US 6,129,890 · App. 09/391,121
Method of making non-sag tungsten wire
Inventors:
Hans-Joachim Lunk, Henry J. Stevens, Thomas J. Patrician, Harry D. Martin, III
Patented Case
View Patent ↗
Granted: Oct 10, 2000
Filed: Sep 7, 1999
Inventors
Hans-Joachim Lunk
Henry J. Stevens
Thomas J. Patrician
Harry D. Martin, III
Assignee (at issue)
OSRAM SYLVANIA 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.