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For the Inventor, By the Inventor

Tokyo, Japan

Yoshio Midorikawa

USPTO Granted Patents = 7

Average Co-Inventor Count = 1.0

ph-index = 4

Forward Citations = 53(Granted Patents)


Location History:

  • Tokyo, JA (1978)
  • Tokyo, JP (1978 - 1999)

Company Filing History:

goldMedal3 out of 24 
 
Glasrock Products, Inc.
 patents
silverMedal2 out of 10 
 
Toyo Polymer Co., Ltd.
 patents
bronzeMedal1 out of 294 
 
Kotobuki Co., Ltd.
 patents
4. 1 out of 1 
 
Tokyo Polymer Co., Ltd.
 patent
5. 1 out of 1 
 
Tohyo Porimah Kabushikigaisha
 patent
where one patent can have more than one assignee

Years Active: 1978-1999

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7 patents (USPTO):
1. 5925580 - Repellent cloth using fluoroplastic fibers (1999-07-20),
2. 5073220 - Method for producing a gripping stick (1991-12-17),
3. 4751584 - Display-reproducing apparatus (1988-06-14),
4. 4540300 - Retractable capless marking pen (1985-09-10),
5. 4104781 - Method of manufacturing a marking pen having a nib and an ink reservoir (1978-08-08),
6. 4093769 - Capillary body and method of producing the same (1978-06-06),
7. 4086312 - Writing pen core having an integral nib and ink reservoir and method of (1978-04-25),
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