Patents by Inventor David L. Murray

David L. Murray 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).

  • Planter gauge wheels with adjustable equalizer mechanism
    Patent number: 4430952
    Abstract: A row crop planter unit (11) is supported by a pair of laterally spaced wheel and disc assemblies (56, 57) mounted on corresponding ends of a pair of walking beams (58, 59). The other corresponding ends of the walking beams (58, 59) are interconnected by an equalizer mechanism (76) which includes a cable (91) and vertically adjustable pulley (77).
    Type: Grant
    Filed: September 7, 1982
    Date of Patent: February 14, 1984
    Assignee: Allis-Chalmers Corporation
    Inventor: David L. Murray
  • Topical ophthalmic use of Prazosin
    Patent number: 4197301
    Abstract: An ophthalmic composition comprising Prazosin or a pharmaceutically acceptable salt thereof and a topically administrable ophthalmic pharmaceutical carrier. The foregoing composition is useful in lowering intraocular pressure in the eye. Reduction of intraocular pressure is of particular importance in the treatment of glaucoma, a disease characterized by elevated intraocular pressure.
    Type: Grant
    Filed: October 16, 1978
    Date of Patent: April 8, 1980
    Assignee: Allergan Pharmaceuticals, Inc.
    Inventors: Barry R. Smith, David L. Murray