Patents Represented by Law Firm Cushmam, Darby & Cushman
  • Patent number: 5370889
    Abstract: Microporous film of ultra high molecular weight polyethylene with a high degree of moisture vapor transmission rate and a permeability to air that lies within a narrow range and a process for the production of a film with a high degree of moisture vapor transmission rate and a permeability to air that lies within a narrow range from a polyolefine by extruding a solution of the polyolefine in a first solvent, followed by cooling, the removal of the solvent and stretching of the film, in which the surface of one and only one side of the film is brought into close contact with a second solvent for the polyolefine before the film is contacted with the cooling agent.
    Type: Grant
    Filed: July 12, 1993
    Date of Patent: December 6, 1994
    Assignee: DSM N.V.
    Inventors: Henricus M. Fortuin, Joseph A. P. M. Simmelink
  • Patent number: 4712204
    Abstract: In an optical disk having grooves, pits representing reference signals in header regions of the grooves are disposed to be spaced apart from each other in a longitudinal direction of the groove to suppress undesirable interference or crosstalk of the reference signals in adjacent V-grooves. In the reproduction of such reference signals, two laser beam spots are respectively irradiated on the first and second oblique surface tracks in the V-groove. Two electric signals made by detecting the light reflected from the spots are examined to determine whether they are in coincidence. When coincidence is confirmed, the signals are used as valid reference signals.
    Type: Grant
    Filed: August 23, 1985
    Date of Patent: December 8, 1987
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshinari Takemura, Kazuaki Obara, Michiyoshi Nagashima
  • Patent number: 4470479
    Abstract: A speaker diaphragm of the present invention is prepared in a manner such that a boron layer is formed on one face of a dome-shaped metal foil by means of a physical vapor deposition method such as ion-plating, cathode sputtering, vacuum evaporation or the like, when necessary the metal foil is thinned by etching, and then, if necessary, another boron layer is formed on the other face of the metal foil. Alternatively, a metal layer is formed on the surface of the boron layer. The resultant speaker diaphragm is light in weight and high in modulus and also has appropriate internal mechanical resistance against vibration, thereby providing a speaker of high efficiency and satisfactory characteristics.
    Type: Grant
    Filed: December 28, 1979
    Date of Patent: September 11, 1984
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hideaki Inoue, Hiroshi Takeuchi, Hidetsugu Kawabata, Keizo Ishiwatari
  • Patent number: 4405926
    Abstract: Electrical transmission lines are a collision hazard to low-flying aircraft, especially helicopters. Warning of the proximity and bearing of such lines is provided by equipping the aircraft to detect the alternating magnetic flux produced by such lines. The bearing is indicated by intercepting the horizontal flux component by two coils mounted in a vertical plane at right angles to one another. The ratio of the signals induced in the two coils is a measure of the bearing of the flux source. The induced AC signals are amplified and rectified, and their ratio is compared with predetermined ratio values corresponding to given bearing sectors. The output conditions thus obtained, together with a quadrant-identifying signal obtained by multiplying together the two AC signals, are gated to illuminate that element of a directional display corresponding to the sector in which the bearing lies. Early warning is provided by a third coil which intercepts the larger vertical flux component.
    Type: Grant
    Filed: May 6, 1980
    Date of Patent: September 20, 1983
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventor: Keith E. Potter
  • Patent number: 3948596
    Abstract: A dye composition for keratinic fibers comprising in combination:A. at least one oxidation base selected from the group consisting of an aromatic or heterocyclic compound carrying either two amino groups or one amine group and one hydroxy group, fixed in para position relative to each other on the aromatic or heterocyclic nucleus of said compound, said oxidation base being in the form of a free base or in the form of an acid addition salt thereof; andB. at least one coupler of the formula: ##SPC1##Wherein X represents a member selected from the group consisting of F, Cl or Br.
    Type: Grant
    Filed: June 24, 1974
    Date of Patent: April 6, 1976
    Assignee: Societe Anonyme dite: L'Oreal
    Inventors: Gregoire Kalopissis, Andree Bugaut