John B. McDonough

MC Mine Safety Appliances Company: 1 patents #104 of 243Top 45%

📍 Washington, PA: #320 of 552 inventorsTop 60%

🗺 Pennsylvania: #43,221 of 74,527 inventorsTop 60%

Overall (All Time): #4,080,659 of 4,157,543Top 100%

Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4365981	Gas filter	—	1982-12-28