Inventor
PITT JOHN M
US4 patents
Patents
4 patentsUS4411160AOct 25, 1983
Vane modulus soil tester
UNIV IOWA STATE RES FOUND INC24 citations79
US4075885AFeb 28, 1978
Rock borehole shear tester
UNIV IOWA STATE RES FOUND INC27 citations78
US4557147ADec 10, 1985
Bore hole rock shear tester and method for using same
UNIV IOWA STATE RES FOUND INC12 citations71
US4494694AJan 22, 1985
Support system for a railroad track
UNIV IOWA STATE RES FOUND INC15 citations67