This inventor holds 1 USPTO granted patent. Top assignee: Kabushiki Kaisha Toshiba. Active years: 1989.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
Years Active: 1989
Title: Ryohei Oba: Inventor in Communication Tone-Signal Technology.
Introduction
Ryohei Oba is an inventor associated with Hino, Japan, and Kabushiki Kaisha Toshiba. His patent work includes a system for generating tone signals in communication apparatus.
Latest Patents
Oba is credited with 1 patent: “Tone Signal Generating System for Use in Communication Apparatus.” The invention stores digital data representing the amplitude values of a tone waveform at multiple sampling points. It repeatedly reads the data at a predetermined speed to create a quasi-sine-wave signal, then uses a low-pass filter to remove harmonic components and produce the desired tone signal.
Career Highlights
Oba’s documented patent highlights his work on digital signal generation for communication equipment. The system uses stored waveform data and filtering to produce a tone signal.
Collaborations
Oba’s listed coworker is Arata Obayashi. His patent is associated with Kabushiki Kaisha Toshiba.
Conclusion
Ryohei Oba’s patent documents a practical approach to generating tone signals for communication apparatus through repeated digital-data playback and low-pass filtering.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile