John J. Kelmar

📍 McKeesport, PA: #43 of 192 inventorsTop 25%

🗺 Pennsylvania: #19,182 of 74,527 inventorsTop 30%

Overall (All Time): #1,302,276 of 4,157,543Top 35%

Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #	Title	Co-Inventors	Date
4978106	Iron reduction apparatus	—	1990-12-18
4820313	Coal processing method and apparatus	—	1989-04-11
4670049	Oxygen blast furnace for direct steel making	—	1987-06-02
4249996	Electrically heated by-product coke oven	—	1981-02-10