Robert K. Hayden

📍 Baltimore, MD: #1,274 of 4,923 inventorsTop 30%

🗺 Maryland: #10,129 of 35,612 inventorsTop 30%

Overall (All Time): #1,684,578 of 4,157,543Top 45%

Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
4330894	Method of opening metal beverage containers	—	1982-05-25
4273086	Device and method for freeing frozen engine cylinders	—	1981-06-16
4259545	High voltage safety-glow insulator	—	1981-03-31