LE

L. David Engel

OP Optiva: 1 patents #18 of 44Top 45%
UW University Of Washington: 1 patents #985 of 2,234Top 45%
Overall (All Time): #2,293,825 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
5305492 Brush element for an acoustic toothbrush David Giuliani 1994-04-26
4787847 Dental hygiene device Roy W. Martin, Joseph Miller 1988-11-29