This inventor holds 4 USPTO granted patents. Top assignees: Canon Kabushiki Kaisha, Canon Denshi Kabushiki Kaisha. Active years: 1982.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
4 out of 93,085 
3 out of 318 
Years Active: 1982
Title: Takehiko Ohniwa: Innovator in Electromagnetic Devices
Introduction
Takehiko Ohniwa is a notable inventor based in Chichibu, Japan. He has made significant contributions to the field of electromagnetic devices, holding a total of 4 patents. His innovative work has impacted various applications, particularly in shutter mechanisms.
Latest Patents
One of Ohniwa's latest patents is the electromagnetic release shutter. This invention features a shutter of the electromagnetic release type, designed to have shutter blades locked by locking members in their charged states. The mechanism allows for exposure by releasing the shutter blades from the locking members. A first locking member secures each charged shutter blade, while a second locking member locks the shutter blade when it is released from the first locking member. The release of the shutter blade from the second locking member is facilitated by the action of an electromagnet, requiring less releasing torque than the first locking member.
Another significant patent is a hold releasing magnetic device. This device is designed to control the current supply to a magnet, allowing the armature to be displaced relative to the yoke. This displacement releases a held shutter member, with the armature and yoke supported coaxially on the same shaft mounted on a base plate.
Career Highlights
Throughout his career, Takehiko Ohniwa has worked with prominent companies, including Canon Kabushiki Kaisha and Canon Denshi Kabushiki Kaisha. His experience in these organizations has contributed to his expertise in developing innovative electromagnetic devices.
Collaborations
Ohniwa has collaborated with notable coworkers such as Syuichiro Saito and Michio Senuma. Their collective efforts have further advanced the field of electromagnetic technology.
Conclusion
Takehiko Ohniwa's contributions to electromagnetic devices, particularly in shutter mechanisms, showcase his innovative spirit and technical expertise. His patents reflect a commitment to advancing technology in practical applications.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile