Karl H. Kahl

📍 Chelmsford, MA: #414 of 858 inventorsTop 50%

🗺 Massachusetts: #42,150 of 88,656 inventorsTop 50%

Overall (All Time): #2,321,459 of 4,157,543Top 60%

Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
4898152	Dual sequence solar water heater	—	1990-02-06
4381763	Low cost, low pressure, solar heated fence surrounding a swimming pool	—	1983-05-03