David B. Knowles

TO Transitions Optical: 1 patents #1 of 1Top 100%

📍 Vandergrift, PA: #8 of 22 inventorsTop 40%

🗺 Pennsylvania: #948 of 4,234 inventorsTop 25%

Overall (1994): #145,226 of 165,921Top 90%

Patents 1994

Issued Patents 1994

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
5369158	Photochromic naphthopyrans	—	1994-11-29