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Inventor
KONISHI KATUNARI
JP
2 patents
Patents
2 patents
US6138958A
Oct 31, 2000
Spring rail frog
YAMATO KOGYO KK
12 citations
68
US5782437A
Jul 21, 1998
Spring rail frog having bendable rail with modified cross-section
YAMATO KOGYO KK
10 citations
68