Growing community of inventors

Tsuchiura, Japan

Keiji Ahiko

Average Co-Inventor Count = 7.00

ph-index = 3

The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.

Forward Citations = 65

Keiji Ahiko ↔ Shigehisa Hagura (3 patents)Keiji Ahiko ↔ Kazuhiko Hiraoka (3 patents)Keiji Ahiko ↔ Tomoyuki Miyata (3 patents)Keiji Ahiko ↔ Junya Kawamoto (3 patents)Keiji Ahiko ↔ Tomoyuki Tanaka (2 patents)Keiji Ahiko ↔ Hiroshi Tabeta (2 patents)Keiji Ahiko ↔ Osamu Kokuryou (1 patent)Keiji Ahiko ↔ Ryozo Fujikawa (1 patent)Keiji AhikoKeiji Ahiko (3 patents)Shigehisa HaguraShigehisa Hagura (44 patents)Kazuhiko HiraokaKazuhiko Hiraoka (39 patents)Tomoyuki MiyataTomoyuki Miyata (36 patents)Junya KawamotoJunya Kawamoto (33 patents)Tomoyuki TanakaTomoyuki Tanaka (25 patents)Hiroshi TabetaHiroshi Tabeta (22 patents)Osamu KokuryouOsamu Kokuryou (5 patents)Ryozo FujikawaRyozo Fujikawa (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Hitachi Construction Machinery Co., Ltd. (3 from 1,504 patents)


3 patents:

1. D752651 - Excavator

2. D752113 - Excavator

3. D752112 - Excavator

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as of
1/5/2026
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