HJ

Hugh P. Thornton, Jr.

AT American District Telegraph: 3 patents #11 of 49Top 25%
📍 Acton, MA: #597 of 1,334 inventorsTop 45%
🗺 Massachusetts: #33,482 of 88,656 inventorsTop 40%
Overall (All Time): #1,680,195 of 4,157,543Top 45%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
D279872 Photoelectric smoke detector Robert B. Powers 1985-07-30
D279769 Smoke detector Robert B. Powers 1985-07-23
D271671 Smoke detector — 1983-12-06