Inventor
HAYASHIDA YASUMASA
JP4 patents
Patents
4 patentsUS5044835ASep 3, 1991
Expansion joint for use in constructing concrete structures
ASAHI DENKA KOGYO KK20 citations79
US4816509AMar 28, 1989
Water swellable sealant
ASAHI DENKA KOGYO KK9 citations70
US4905429AMar 6, 1990
Device for filling up of recess left in concrete wall after removal
ASAHI DENKA KOGYO KK14 citations65
US4889312ADec 26, 1989
Waterstop for concrete form separator
ASAHI DENKA KOGYO KK3 citations51