Granted Patent
Utility
US 5,090,789 · App. 07/562,271
Laser light show device and method
Inventor:
Allen Crabtree
Patented Case
View Patent ↗
Granted: Feb 25, 1992
Filed: Aug 3, 1990
Inventor
Allen Crabtree
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.