DH

Donald N. Halgren

📍 Attleboro, MA: #4 of 48 inventorsTop 9%
🗺 Massachusetts: #122 of 4,501 inventorsTop 3%
Overall (1997): #8,503 of 185,788Top 5%
4
Patents 1997

Issued Patents 1997

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
5691716 Keyboard with keys for moving cursor Robert J. Crowley 1997-11-25
5666112 Key for flexible keyboard Robert J. Crowley 1997-09-09
5648771 Wrist rest bag for flexible keyboard Robert J. Crowley 1997-07-15
5642109 Flexible inflatable multi-chamber signal generator Robert J. Crowley 1997-06-24