Robert R. Pierce

PE Pennwalt: 1 patents #119 of 288Top 45%

📍 Philadelphia, PA: #2,553 of 4,834 inventorsTop 55%

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

Overall (All Time): #4,121,720 of 4,157,543Top 100%

Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4227932	Single component potassium silicate cement for dry gunning	George R. Leah	1980-10-14