Company Filing History:
3 out of 3,781 
2 out of 26 
1 out of 3 Years Active: 2006-2008
Title: Hiroshi Hagisawa: Innovator in Communication Technology
Introduction
Hiroshi Hagisawa is a notable inventor based in Tamamura, Japan. He has made significant contributions to the field of communication technology, holding a total of 3 patents. His work primarily focuses on advanced transmitter systems and integrated circuits.
Latest Patents
Hagisawa's latest patents include innovative designs for transmitters and semiconductor integrated circuits for communication. One of his patents describes a transmitter that adopts a polar loop system, which includes a phase control loop for managing the phase of a carrier signal from a transmitting oscillator. This system also features an amplitude control loop for regulating the amplitude of the output signal from a power amplification circuit. The design allows for transmission using both GMSK and 8-PSK modulation modes. The phase control loop is shared between these two modulation modes, and a component similar to those in the loop filter can be connected or disconnected based on the modulation mode, utilizing a switching element.
Another patent focuses on a wireless communication apparatus that shares a phase control loop for first and second modulation modes, along with an amplitude control loop. This design enhances the efficiency and versatility of communication systems.
Career Highlights
Hiroshi Hagisawa has worked with prominent companies in the technology sector, including Renesas Technology Corporation and Ttpcom Limited. His experience in these organizations has contributed to his expertise in communication technologies and patent development.
Collaborations
Hagisawa has collaborated with notable colleagues such as Ryoichi Takano and Kazuhiko Hikasa. Their joint efforts have further advanced the field of communication technology.
Conclusion
Hiroshi Hagisawa's innovative work in communication technology, particularly in transmitter systems, showcases his significant contributions to the industry. His patents reflect a deep understanding of modulation techniques and their applications in modern communication systems.
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.