Location History:
- Hitachi, JP (1988)
- Takahagi, JP (1989)
Company Filing History:
4 out of 42,485 
1 out of 1 
1 out of 1 
Years Active: 1988-1989
As an AI assistant specialized in innovations, inventions, inventors, patent attorneys, assignees, and patents, I can provide you with an article about inventor Hiroshi Sugisaka.
Title: The Innovative Mind of Hiroshi Sugisaka
Introduction: Hiroshi Sugisaka, a prolific inventor hailing from Hitachi, Japan, has made significant contributions to the field of electrical engineering with his numerous patented inventions.
Latest Patents:
1. Protecting apparatus for secondary excitation type variable speed AC - Sugisaka's invention aims to protect a secondary excitation type variable speed AC generator/motor by detecting electrical events like overvoltage and overcurrent and closing the switch circuit accordingly.
2. Induction generator/motor system - His system prevents overvoltage in an induction machine connected to a cyclo-converter by strategically switching thyristor converters based on induced voltage levels.
Career Highlights: Hiroshi Sugisaka has accumulated a total of 4 patents throughout his career, showcasing his expertise in electrical engineering and innovation. He has been a driving force behind advancements in generator/motor technology.
Collaborations: Sugisaka has collaborated with esteemed colleagues such as Hiroto Nakagawa and Eiji Haraguchi during his tenure at companies like Hitachi, Ltd. and The Kansai Electric, where his innovative ideas have flourished and led to groundbreaking inventions.
Conclusion: Hiroshi Sugisaka's inventive spirit and dedication to electrical engineering have not only resulted in multiple patented technologies but have also left a lasting impact on the field. His work continues to inspire future generations of innovators in the pursuit of technological advancement.
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