Granted Patent
Utility
US 4,825,124 · App. 07/043,792
Phosphor particle, fluorescent lamp, and manufacturing method
Inventor:
A. Gary Sigai
Patented Case
View Patent ↗
Granted: Apr 25, 1989
Filed: Apr 29, 1987
Inventor
A. Gary Sigai
Assignee (at issue)
GTE Laboratories Incorporated
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.