Patents by Inventor Junji OSADA

Junji OSADA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Filter device
    Patent number: 11831301
    Abstract: A filter device includes a common connection terminal, a first bandpass filter connected to the common connection terminal and including an inductor, and a second bandpass filter connected to the common connection terminal and having a pass band lower in frequency than a pass band of the first bandpass filter. The filter device uses SH waves. The first bandpass filter is a ladder filter. Each of series arm resonators and parallel arm resonators includes an interdigital transducer electrode. Of the parallel arm resonators of the first bandpass filter, the inductor is connected in series to the parallel arm resonator with a shortest electrode finger pitch of the interdigital transducer electrode.
    Type: Grant
    Filed: May 18, 2021
    Date of Patent: November 28, 2023
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Junji Osada, Norihiko Nakahashi
  • FILTER DEVICE
    Publication number: 20210273633
    Abstract: A filter device includes a common connection terminal, a first bandpass filter connected to the common connection terminal and including an inductor, and a second bandpass filter connected to the common connection terminal and having a pass band lower in frequency than a pass band of the first bandpass filter. The filter device uses SH waves. The first bandpass filter is a ladder filter. Each of series arm resonators and parallel arm resonators includes an interdigital transducer electrode. Of the parallel arm resonators of the first bandpass filter, the inductor is connected in series to the parallel arm resonator with a shortest electrode finger pitch of the interdigital transducer electrode.
    Type: Application
    Filed: May 18, 2021
    Publication date: September 2, 2021
    Inventors: Junji OSADA, Norihiko NAKAHASHI