Granted Patent
Utility
US 6,184,628 · App. 09/452,014
Multicolor led lamp bulb for underwater pool lights
Inventor:
Douglas Ruthenberg
Patented Case
View Patent ↗
Granted: Feb 6, 2001
Filed: Nov 30, 1999
Inventor
Douglas Ruthenberg
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.