Patents Represented by Law Firm Dawson, Tilton, Fallon & Lungmus
  • Patent number: 3934992
    Abstract: An air filter for use on a truck or similar system includes a cylindrical side wall which is an integral part of or adapted to be mounted on a tank, such as the fuel tank of the truck as the principal means of support. The housing includes a front wall with a removable closure for permitting access to the interior to facilitate removal or replacement of the filter element without having to remove the inlet or outlet air conduits.
    Type: Grant
    Filed: June 19, 1974
    Date of Patent: January 27, 1976
    Assignees: Terrence V. Thompson, George Athans, Leonidas Athans
    Inventor: Terrence V. Thompson
  • Patent number: 3934462
    Abstract: A transducer, placed on an eye being tested, generates an analog signal representative of pressure. The analog signal is periodically converted to digital signals in binary coded decimal representation. Each test is carried out under control of a computer driven by a real time clock which is actuated in response to placing the tonometer in test position on an eye. The computer takes the tonometer measurements at predetermined times as determined by the real time clock, and stores the data in a random access memory, together with signals representative of other important test parameters. From this data, the computer calculates intraocular pressure, the coefficient of outflow value and the flow value, which are also stored in the memory. A visual display unit is associated with the memory for displaying the tonometer measurement data, test parameters and computed results. Test measurements and other test parameters may also be loaded into the system by a manually operated keyboard for computation and display.
    Type: Grant
    Filed: September 6, 1974
    Date of Patent: January 27, 1976
    Assignee: American Hospital Supply Corporation
    Inventor: Richard F. Rende
  • Patent number: 3934907
    Abstract: A latch assembly for holding the doors of trucks and other vehicles in open condition, the assembly including a pivotal latch bar having an enlarged free end adapted to be received in the recess of a keeper, and a spring arm having a free end slidably engaging the bar throughout only a portion of the arc of pivotal movement of the bar.
    Type: Grant
    Filed: August 23, 1974
    Date of Patent: January 27, 1976
    Inventor: Daniel A. McGillivray
  • Patent number: 3934977
    Abstract: A colorimetric determination of total calcium in serum and other body fluids comprising the steps of mixing the sample of body fluid with a liquid reagent consisting of 2,7-bis-(4 chloro-2-phosphonobenzeneazo)-1,8-dihydroxynapthalene-3,6-disulfonic acid, commonly known as chlorophosphonazo III, in a buffer system at pH 5.0 to 5.5, and thereafter spectrophotometrically measuring the level of color development. Potassium hydrogen phthalate is disclosed as a component of the buffer system.
    Type: Grant
    Filed: August 9, 1974
    Date of Patent: January 27, 1976
    Assignee: American Hospital Supply Corporation
    Inventor: Kenneth E. Cleaver