Location History:
- Hussa, JP (1990)
- Fussa, JP (1991)
Company Filing History:
Years Active: 1990-1991
Title: Sadao Ogawa: Innovator in Filter Technology
Introduction
Sadao Ogawa is a notable inventor based in Hussa, Japan, recognized for his contributions to filter technology. With a total of two patents to his name, Ogawa has made significant advancements in the field of radio communication equipment.
Latest Patents
Ogawa's latest patents include a band-stop filter and a branching filter. The band-stop filter comprises a plurality of resonator units, each consisting of an end-shorted coaxial resonator and a variable condenser connected in series. This innovative design features a printed circuit board that combines the resonator units in a multistage configuration, with thru-holes adjacent to a bushing that isolates the inner conductor of the resonator from the board. An adjusting screw, slightly larger than the thru-hole, provides both proper torque and electrical connection. The inner conductor surface of the resonator functions electrically as a stator, while the adjusting screw acts as a rotor.
The branching filter is designed for separating or combining two different frequencies without interference in radio communication equipment. It consists of one or both filter blocks that utilize a dielectric bandpass filter to allow the desired wave to pass while a SAW band stop filter is connected in series to prevent the passage of the undesired wave.
Career Highlights
Throughout his career, Sadao Ogawa has worked with prominent companies such as Kokusai Denki Kabushiki Kaisha and Kokusai Electric Co., Ltd. His work has significantly impacted the development of advanced filtering technologies.
Collaborations
Ogawa has collaborated with notable individuals in the field, including Kanemi Sasaki and Mikio Takano. Their joint efforts have contributed to the advancement of innovative solutions in filter technology.
Conclusion
Sadao Ogawa's contributions to filter technology through his patents and collaborations highlight his role as an influential inventor in the field. His work continues to shape advancements in radio communication equipment.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.