RB

Robert W. Birckhead

AP Alpine Engineered Products: 1 patents #9 of 23Top 40%
Overall (All Time): #1,304,271 of 4,157,543Top 35%
4
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4737060 Staggered teeth plate 1988-04-12
4625535 Method of forming truss plates 1986-12-02
4549838 Method of manufacturing a connector plate, connector plate and machine for manufacturing connector plate 1985-10-29
4442649 Fabricated beam William R. McAlpine 1984-04-17