Patents by Inventor David Muirhead

David Muirhead 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).

  • Rotatable sole assembly
    Patent number: 10667575
    Abstract: We disclose herein a rotatable sole assembly for a shoe which comprises a first plate (305), a second plate (320); and a coating layer (330) between the first and second plates. The coating layer (330) is configured to rotate one of the first and second plates with respect to the other of the first and second plates. The sole assembly is designed to reduce ACL injuries as well as the incidence of other lower leg injuries related to high torque forces.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: June 2, 2020
    Assignee: SATRA TECHNOLOGY CENTRE LIMITED
    Inventors: David Roger Smith, Thomas John William Bayes, Philip David Muirhead
  • ROTATABLE SOLE ASSEMBLY
    Publication number: 20180125161
    Abstract: We disclose herein a rotatable sole assembly for a shoe which comprises a first plate (305), a second plate (320); and a coating layer (330) between the first and second plates. The coating layer (330) is configured to rotate one of the first and second plates with respect to the other of the first and second plates. The sole assembly is designed to reduce ACL injuries as well as the incidence of other lower leg injuries related to high torque forces.
    Type: Application
    Filed: May 11, 2016
    Publication date: May 10, 2018
    Inventors: David Roger SMITH, Thomas John William BAYES, Philip David MUIRHEAD
  • Drilling fluid analysis using time-of-flight mass spectrometry
    Patent number: 9745848
    Abstract: An example method for analyzing drilling fluid used in a drilling operation within a subterranean formation may comprise placing a TOF-MS in fluid communication with a drilling fluid. The drilling fluid may be flowing through a fluid conduit coupled to a drilling assembly. A chemical composition of the drilling fluid may be determined using the TOF-MS. And a formation characteristic may be determined using the determined chemical composition.
    Type: Grant
    Filed: August 22, 2013
    Date of Patent: August 29, 2017
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Mathew D. Rowe, David Muirhead
  • DRILLING FLUID ANALYSIS USING TIME-OF-FLIGHT MASS SPECTROMETRY
    Publication number: 20150260035
    Abstract: An example method for analyzing drilling fluid used in a drilling operation within a subterranean formation may comprise placing a TOF-MS in fluid communication with a drilling fluid. The drilling fluid may be flowing through a fluid conduit coupled to a drilling assembly. A chemical composition of the drilling fluid may be determined using the TOF-MS. And a formation characteristic may be determined using the determined chemical composition.
    Type: Application
    Filed: August 22, 2013
    Publication date: September 17, 2015
    Inventors: Mathew D. Rowe, David Muirhead