James J. Cowan

PO Polaroid: 2 patents #11 of 103Top 15%

PD Polaroid-Corporation-Patent Department: 1 patents #3 of 11Top 30%

📍 Lexington, MA: #4 of 101 inventorsTop 4%

🗺 Massachusetts: #90 of 2,831 inventorsTop 4%

Overall (1989): #9,891 of 140,708Top 8%

Patents 1989

Issued Patents 1989

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
4888260	Volume phase reflection holograms and methods for fabricating them	—	1989-12-19
4874213	Method of forming volume phase reflection holograms	—	1989-10-17
4839250	Method of replicating volume phase reflection holograms	—	1989-06-13