JH

John O. Hazen

HR H. H. Robertson: 4 patents #5 of 27Top 20%
📍 Monaca, PA: #9 of 46 inventorsTop 20%
🗺 Pennsylvania: #19,182 of 74,527 inventorsTop 30%
Overall (All Time): #1,305,534 of 4,157,543Top 35%
4
Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
4656795 Floor panel for elevated floor assembly Raymond E. Albrecht, Rodney W. Gartner, Robert G. Lindner 1987-04-14
4656798 Closure member for an electrical activating assembly 1987-04-14
4289921 Electrical activating assembly and closure member therefor Rodney W. Gartner, Charles R. Gray 1981-09-15
4232493 Fire-resistant electrical wiring distributing floor structure and method Charles R. Gray, Charles J. Kelly 1980-11-11