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Hiroshi Kusumi

USPTO Granted Patents = 3

Average Co-Inventor Count = 2.9

ph-index = 2

Forward Citations = 13(Granted Patents)

Location History:

Honjo, JP (1982)
Ibaraki, JP (1991)
Ibaragi, JP (1993)

Company Filing History:

Hitachi Construction Machinery Co., Ltd.

Years Active: 1982-1993

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3 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5263899 - Cylindrical telescopic kelly-bar apparatus (1993-11-23),

2. 4984936 - Stopper apparatus for rotary reaction force (1991-01-15),

3. 4326736 - Swivel joint for reverse circulation drill (1982-04-27),

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