Granted Patent
Utility
US 6,045,249 · App. 09/232,978
Twist-in light pipe
Inventors:
Carl P. Bellinghausen, David T. Coleman
Patented Case
View Patent ↗
Granted: Apr 4, 2000
Filed: Jan 19, 1999
Inventors
Carl P. Bellinghausen
David T. Coleman
Assignee (at issue)
LUCENT TECHNOLOGIES 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.