Patents by Inventor Yoshinobu Sengiku

Yoshinobu Sengiku 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).

  • Patent number: 5889732
    Abstract: A sounder has a first plate 1 that is molded into a lower case. The first plate functions not only as part of a magnetic circuit, but also as a terminal on the outside of the sounder. The first plate has a coil positioned around a center pole on the first plate and a coil connector for attachment to an end of the coil. A second plate 5 is molded into the lower case and also has a coil connector for attachment to another end of the coil. Accordingly, both ends of the coil can be coupled to the connectors on the inside of the sounder. With this arrangement, the outside of the plates are conductive to an outside connector terminal, thereby eliminating having to pull out both ends of the coil from behind the plates.
    Type: Grant
    Filed: June 25, 1997
    Date of Patent: March 30, 1999
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takanori Fukuyama, Yoshinobu Sengiku, Mitsutaka Enomoto, Kazuhiro Yoshida, Kazuya Yamasaki
  • Patent number: 5583944
    Abstract: A speaker having a diaphragm with an outer peripheral part. A voice coil is disposed within and coupled to the diaphragm, the voice coil supported by a voice coil bobbin with the voice coil having at least two lead wires. The speaker includes a generally cup-shaped frame with the diaphragm disposed inside of the frame so that an outer peripheral part of the diaphragm is coupled to the frame with a damper disposed inside of the cup-shaped frame so that adhesive on the outer part of the damper is used to adhere the damper to the frame.
    Type: Grant
    Filed: April 28, 1995
    Date of Patent: December 10, 1996
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yukinori Morohoshi, Yoshinobu Sengiku, Asahiko Okada, Teru Kawahara, Manabu Muraoka, Eiichi Morimoto, Ryoui Hamaguchi