David A. Levien

PL Phosphor Products Company Limited: 1 patents #2 of 9Top 25%

TL Ti Corporate Services Limited: 1 patents #7 of 16Top 45%

📍 Sawston, GB: #20 of 30 inventorsTop 70%

Overall (All Time): #3,955,812 of 4,157,543Top 100%

Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4758830	Switch/display units	Michael A. Pym, William Graham, Peter J. Smith	1988-07-19