Inventor

CAMPAU JOHN A

US2 patents

⚠️ This page may combine multiple inventors who share the name “CAMPAU JOHN A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

KEYSTONE RETAINING WALL SYSTEM

1 patent

US6803002B2Oct 12, 2004

Method for making and treating wall blocks

KEYSTONE RETAINING WALL SYSTEM37 citations86

LITHIBAR MATIK INC

1 patent

US5788460AAug 4, 1998

Method and apparatus for patterning concrete blocks and products

LITHIBAR MATIK INC15 citations65