Granted Patent
Utility
US 5,981,640 · App. 09/127,283
Laser markable acrylonitrile-butadiene-styrene polymer for telecommunications terminals and keypads
Inventor:
Jae Hong Choi
Patented Case
View Patent ↗
Granted: Nov 9, 1999
Filed: Jul 31, 1998
Inventor
Jae Hong Choi
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.