logo

For the Inventor, By the Inventor

Musashimurayama, Japan

Yoshihiko Yanagawa

This inventor holds 6 USPTO granted patents. Top assignee: Citizen Watch Company, Ltd.. Active years: 1976-1999.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yoshihiko Yanagawa. Retrieved from https://idiyas.com/inventor/yoshihiko-yanagawa

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 6

% Patents Active = 100.0

Average Co-Inventor Count = 1.8

ph-index = 6

Forward Citations = 92(Granted Patents)


Location History:

  • Musashimurayama, JA (1976)
  • Saitama, JP (1986 - 1994)
  • Tokyo, JP (1996)
  • Musashimurayama, JP (1994 - 1999)

Company Filing History:

goldMedal6 out of 2,004 
 
Citizen Watch Company, Ltd.
 patents

Years Active: 1976-1999

Loading Chart...
6 patents (USPTO):Explore Patents
1. 5984448 - Circuit for driving ink-jet head and method of driving the same (1999-11-16),
2. 5499042 - Ink jet head having dummy pressure chambers and inclined groups of (1996-03-12),
3. 5359354 - Ink jet head with dummy slots (1994-10-25),
4. 5289209 - Printing head for ink-jet printer (1994-02-22),
5. 4581567 - Device for feeding magnetic head (1986-04-08),
6. 3946591 - Method of and system for detecting the rate of an electronic timepiece (1976-03-30),

Title: Innovations of Yoshihiko Yanagawa

Introduction

Yoshihiko Yanagawa is a notable inventor based in Musashimurayama, Japan. He has made significant contributions to the field of ink-jet technology, holding a total of 6 patents. His work has been instrumental in advancing the efficiency and functionality of ink-jet heads.

Latest Patents

Among his latest patents is a circuit for driving an ink-jet head and a method of driving the same. This innovation involves an ink-jet head that features dummy pressure chambers and inclined groups of pressure chambers. In a piezoelectric type ink-jet head, a plurality of pressure chambers are separated into n groups, each having dummy pressure chambers at opposite ends. The increased spacing between ejection nozzles, resulting from the dummy pressure chambers, is compensated for by inclining the nozzle openings within each of the groups. The ink-jet head is driven in a time-sharing manner, enhancing its performance.

Career Highlights

Yoshihiko Yanagawa is currently employed at Citizen Watch Company, Ltd., where he continues to innovate and develop new technologies. His work at Citizen has allowed him to collaborate with other talented engineers and inventors in the field.

Collaborations

Some of his notable coworkers include Shizuo Yamaguchi and Hisato Hiraishi. Their combined expertise contributes to the innovative environment at Citizen Watch Company, Ltd.

Conclusion

Yoshihiko Yanagawa's contributions to ink-jet technology through his patents and collaborations highlight his importance as an inventor. His work continues to influence advancements in the industry, showcasing the impact of innovation in technology.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
Loading…