Hugh B. Matthews

SP Sperry: 3 patents #5 of 162Top 4%

📍 Boylston, MA: #1 of 3 inventorsTop 35%

🗺 Massachusetts: #56 of 1,827 inventorsTop 4%

Overall (1982): #4,695 of 81,411Top 6%

Patents 1982

Issued Patents 1982

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
4342197	Geothermal pump down-hole energy regeneration system	—	1982-08-03
4328673	Geothermal pump dual cycle system	—	1982-05-11
4325681	Geothermal irrigation pump	—	1982-04-20