Patents by Inventor Yutaka Ichikawa

Yutaka Ichikawa 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: 11969530
    Abstract: A system and a solution-preparation-determining apparatus which determines whether additional preparation of an undiluted dialysate solution is necessary.
    Type: Grant
    Filed: November 9, 2021
    Date of Patent: April 30, 2024
    Assignee: Nikkiso Company Limited
    Inventors: Shunsuke Taguchi, Ryouhei Matsumoto, Yutaka Ishikawa, Takeshi Ichikawa
  • Patent number: 11929294
    Abstract: A composite substrate includes a base layer formed of a composite material containing diamond and a metal, the base layer a first surface, and a second surface opposite to the first surface; a flat layer having a lower surface bonded to the first surface of the base layer, and an upper surface having a surface roughness Ra of 10 nm or less; and an insulating layer directly bonded to the upper surface of the flat layer.
    Type: Grant
    Filed: September 29, 2021
    Date of Patent: March 12, 2024
    Assignee: NICHIA CORPORATION
    Inventors: Masatsugu Ichikawa, Shoichi Yamada, Takeshi Kihara, Yutaka Matsusaka
  • Patent number: 9109294
    Abstract: Disclosed is a manufacturing method which enables manufacturing of an ultra-fine, thin contact for current inspection jigs. After a gold or gold alloy plating layer is formed, an Ni electroformed layer is formed by electroformation on the outer periphery of the formed plating layer. After a resistant layer is formed on the outer periphery of the Ni electroformed layer, a spiral groove is formed in the resistant layer by laser exposure, and etching is carried out using the resistant layer as a masking material. The Ni electroformed layer is removed from the part of the resistant layer where the spiral groove was formed, and then the resistant layer is removed and the plating layer is removed from the part of the spiral groove section where the Ni electroformed layer was removed. The core material is then removed, leaving the plating layer inside the periphery of the Ni electroformed layer.
    Type: Grant
    Filed: January 27, 2011
    Date of Patent: August 18, 2015
    Assignee: NIDEC-READ CORPORATION
    Inventors: Kesao Kojima, Yutaka Ichikawa
  • Publication number: 20130057309
    Abstract: Disclosed is a manufacturing method which enables manufacturing of an ultra-fine, thin contact for current inspection jigs. After a gold or gold alloy plating layer is formed, an Ni electroformed layer is formed by electroformation on the outer periphery of the formed plating layer. After a resistant layer is formed on the outer periphery of the Ni electroformed layer, a spiral groove is formed in the resistant layer by laser exposure, and etching is carried out using the resistant layer as a masking material. The Ni electroformed layer is removed from the part of the resistant layer where the spiral groove was formed, and then the resistant layer is removed and the plating layer is removed from the part of the spiral groove section where the Ni electroformed layer was removed. The core material is then removed, leaving the plating layer inside the periphery of the Ni electroformed layer.
    Type: Application
    Filed: January 27, 2011
    Publication date: March 7, 2013
    Applicant: LuzCom Inc.
    Inventors: Kesao Kojima, Yutaka Ichikawa
  • Publication number: 20110272283
    Abstract: The invention provides a method of producing an electrocast tube having a fine inner diameter, and an electrocast tube. It also provides a thin wire material for production of an electrocast tube having a fine inner diameter. An electrocast tube producing method comprising the steps of forming an elecrtodeposit around a thin wire material (30) by electrocasting, and removing the thin wire material (30) from the electrodeposit, wherein the thin wire material (30) is removed either by heating the electrodeposit for thermal expansion or by cooling the thin wire material (30) for contraction, so as to form a clearance between the electrodeposit and the thin wire material (30), followed by gripping and pulling, or sucking the thin wire material (30) or physically pushing it away or blowing gas or liquid to push it away.
    Type: Application
    Filed: May 3, 2011
    Publication date: November 10, 2011
    Inventors: Tokuji Oda, Yutaka Ichikawa
  • Publication number: 20110120872
    Abstract: The invention provides a method of producing an electrocast tube having a fine inner diameter, and an electrocast tube. It also provides a thin wire material for production of an electrocast tube having a fine inner diameter. An electrocast tube producing method comprising the steps of forming an elecrtodeposit around a thin wire material (30) by electrocasting, and removing the thin wire material (30) from the electrodeposit, wherein the thin wire material (30) is removed either by heating the electrodeposit for thermal expansion or by cooling the thin wire material (30) for contraction, so as to form a clearance between the electrodeposit and the thin wire material (30), followed by gripping and pulling, or sucking the thin wire material (30) or physically pushing it away or blowing gas or liquid to push it away.
    Type: Application
    Filed: March 22, 2004
    Publication date: May 26, 2011
    Applicant: LUZCOM INC.
    Inventors: Tokuji Oda, Yutaka Ichikawa
  • Patent number: 4956641
    Abstract: In a radio display pager, each character of a received multi-character message is checked for error. A first message arrival or a first receive message is stored in a temporary memory and thereafter rewritten into one of main memories when the next message or second message arrival is received. The temporary memory stores the most recent message arrival and the main memories store a plurality of like messages, according to their successive order of earlier arrivals. Each of the messages in both memories contain both error-free and error-containing characters. The characters stored in the temporary memory respectively correspond in position to the characters stored in each of the main memories. A comparison is made between each error-free character in the temporary memory and each of the positionally corresponding error-free characters in one of the main memories in order to detect a match and mismatch.
    Type: Grant
    Filed: April 8, 1988
    Date of Patent: September 11, 1990
    Assignee: NEC Corporation
    Inventors: Masahiro Matai, Takashi Oyagi, Yutaka Ichikawa, Shinjiro Umetsu
  • Patent number: 4734694
    Abstract: A pager which is usable in a plurality of service areas is disclosed. The pager includes a radio section for selectively receiving and modulating two or more radio frequencies, and frequency switching means for switching the receive frequency of the radio section when a signal on a predetermined receive frequency fails to be received. Power source control means is provided for cutting down power consumption. The own call signal is switched at the same time as the receive frequency to offer an effect as would be provided by a plurality of pagers. The receive frequency is displayed so that the user may see a particular service area to which his or her own pager belongs.
    Type: Grant
    Filed: August 12, 1985
    Date of Patent: March 29, 1988
    Assignee: NEC Corporation
    Inventors: Shinjiro Umetsu, Yutaka Ichikawa, Koichi Nagata