Inventor

NEFF JOHN P

US3 patents

Patents

3 patents

US5209037AMay 11, 1993

Building block insert

THERMALOCK PRODUCTS INC58 citations91

US5066440ANov 19, 1991

Process for making an insulated building block

THERMALOCK PRODUCTS INC42 citations88

US4986049AJan 22, 1991

Insulated building block

THERMALOCK PRODUCTS INC38 citations88