Inventor

KOEHN RICHARD R

5 patents

Patents

5 patents

US4644727AFeb 24, 1987

Strand chair for supporting prestressing cable and cross-mesh in elongated precast concrete plank

FABCON INC38 citations89

USD272517SFeb 7, 1984

Combination lift insert and weld plate for use in hollow core concrete planks

FABCON INC43 citations89

US4457682AJul 3, 1984

Machine for casting concrete members

FABCON INC20 citations71

US4398761AAug 16, 1983

Device for lifting and tilting concrete panels

FABCON INC14 citations71

US4369153AJan 18, 1983

Machine for casting concrete members

FABCON INC18 citations71