1
Masaaki Umezawa: Telephone apparatus for radio communication with an adaptor. OKI Electric, Spencer Frank & Schneider, August 25, 1992: US05142573 (81 worldwide citation)

A telephone apparatus includes a telephone set consisting of a base unit and a handset removably mounted on the base unit. The apparatus also includes a transmitter/receiver, and an adaptor on which the base unit is mounted. The adaptor has an electrical connector which is electrically connected to ...


2
Hajime Shimamura, Yoshiaki Fujita, Masaaki Umezawa, Tomokazu Komazaki: Receiving filter of a saw separator with greater electrode interdigitated width in first stage parallel resonator. Oli Electric, Robert J Frank, James R Burdett, Venable, March 27, 2001: US06208223 (12 worldwide citation)

A receiving filter of a SAW separator that prevents temperature increase, and enables to improve electric power-resisting property and attains high performance. A series arms and parallel arms of a transmitting filter and receiving filter are equipped with ladder type filters comprising SAW resonato ...


3
Hiroyuki Tanabe, Yoshiharu Fujisaku, Masaaki Umezawa: Optical module. Fujikura, Sughrue Mion PLLC, October 24, 2017: US09798098

An optical module includes: a butterfly-type optical device including a body that contains a heating element in an interior space, a lid body that puts a lid on the interior space, and a plurality of pins; a substrate including a connecting surface to which the plurality of pins are connected; and a ...