Inventor
KITAJIMA HISASHI
JP4 patents
⚠️ This page may combine multiple inventors who share the name “KITAJIMA HISASHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
TOA GROUT KOGYO CO
3 patentsUS4545702AOct 8, 1985
Boring-injection device, method for improving ground by means of the device and method for investigating ground state by means of the device
TOA GROUT KOGYO CO29 citations88
US4514112AApr 30, 1985
Method for injecting grouting agent and apparatus for conducting the method
TOA GROUT KOGYO CO24 citations78
US5224742AJul 6, 1993
Method for cutting off water in pipeline and structure of connection portion in pipeline
TOA GROUT KOGYO CO15 citations69