Patents by Inventor Peter E. M. Frere

Peter E. M. Frere 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).

  • Angular rate sensor
    Patent number: 5537872
    Abstract: An angular rate sensor comprises a wafer of silicon etched to form tines with teeth which are interdigitated. The tines are excited into oscillation in the plane of the wafer, by applying suitable drive signals to create electrostatic forces between the tines. Rotation of the tines out of the plane of the wafer is detected by a suitable detector, such as a piezo-resistor on a support of the tines.
    Type: Grant
    Filed: June 3, 1993
    Date of Patent: July 23, 1996
    Assignee: Lucas Industries public limited company
    Inventors: Peter E. M. Frere, Russell W. Craddock
  • Optical device and a method of manufacture thereof
    Patent number: 5384872
    Abstract: A block of monocrystalline silicon oriented so as to have a body surface aligned in a {110} crystallographic plane is selectively etched so as to define a groove for receiving an optical waveguide and a reflecting surface facing the groove. The groove is aligned with a <110> crystallographic axis. The reflecting surface is in a {100} crystallographic plane. Thus, the groove is parallel to the body surface and the reflecting surface is at 45.degree. to the body surface.
    Type: Grant
    Filed: January 27, 1993
    Date of Patent: January 24, 1995
    Assignee: Lucas Industries Public Limited Company
    Inventors: Alan J. Jacobs-Cook, Peter E. M. Frere, Mark E. C. Bowen