RS

Richard H. Spellman

📍 Randolph, MA: #7 of 16 inventorsTop 45%
🗺 Massachusetts: #4,972 of 14,338 inventorsTop 35%
Overall (2023): #281,540 of 537,848Top 55%
1
Patents 2023

Issued Patents 2023

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
11647479 Multi-level signal transmission system for wireless device location David L. Nelson 2023-05-09