Patents by Inventor Akira Minakawa

Akira Minakawa 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).

  • Publication number: 20020045851
    Abstract: The invention aims to provide a compact peritoneal dialysis apparatus using a disposable cassette integrally formed with a diaphragm and heating portion, in which a flow path can be switched quietly and a heating ability is high. By using a disposable cassette (8) integrally formed with a diaphragm, heating portion, and flow path switching portion, a predetermined amount of dialysis fluid is heated to a predetermined temperature with the heating portion. Clamps (111-118) for opening/closing a flow path switching portion are provided in order to form flow paths through which the heated peritoneal dialysis fluid is distributed into the peritoneal cavity of a patient almost continuously and is sucked and drained from the peritoneal cavity of the patient.
    Type: Application
    Filed: October 4, 2001
    Publication date: April 18, 2002
    Inventors: Minoru Suzuki, Akira Minakawa, Hironobu Suzuki, Jun Tsubota, Kazuhiko Hirota, Yoshikazu Makiuchi
  • Patent number: 6188261
    Abstract: A programmable delay generator comprises a first ramp wave generator and a second ramp wave generator, each having the same structure as each other, each of them operating with external common clock pulses, and each of them providing potential gradient and final potential incorporated with an external set data; a comparator for comparing an output (Vs) of the first ramp wave generator and an output (Vk) of the second ramp wave generator so that an output pulse is provided when the outputs of two ramp wave generators coincide with each other; said first ramp wave generator providing a first ramp voltage (Vs) upon receipt of a first set data (S) at a predetermined time (t0); said second ramp wave generator providing a threshold voltage (Vk) upon receipt of a second set data (K) at a time which preceds at least one clock time (T) than said predetermined time (t0); said comparator providing an output pulse delayed by delay time (td) which is proportional to ratio (K/S) of said second set data (K) and said first s
    Type: Grant
    Filed: January 20, 1999
    Date of Patent: February 13, 2001
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Hideyuki Nosaka, Akira Minakawa, Yo Yamaguchi, Akihiro Yamagishi