Patents by Inventor David W. John

David W. John 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).

  • Insulation stripping tool
    Patent number: 6012357
    Abstract: A tool for stripping insulation from the conductor core of a wire or cable includes a pair of longitudinal members which are pivotally interconnected. The tool also includes a pair of blade assemblies, which are removably mounted on the longitudinal members. The blade assemblies can include grooves which cooperate to form openings for passing the conductors while stripping the insulation layers therefrom. The blades can comprise resilient materials, such as polymers, to reduce the risk of cutting the conductor.
    Type: Grant
    Filed: May 13, 1997
    Date of Patent: January 11, 2000
    Inventor: David W. John
  • Marine measurement device
    Patent number: 4673363
    Abstract: A sonobuoy having a terminal weight and sensor for deployment beneath the surface of the water after the buoy has been launched from an aircraft and impacted the water. A circuit assembly and antenna for processing output from the sensor and for transmitting a signal is provided. A cable for connecting the sensor and circuit assembly is also included. A housing for the sonobuoy is a blow molded seamless thermoplastic shell which surrounds the circuit assembly.
    Type: Grant
    Filed: November 8, 1985
    Date of Patent: June 16, 1987
    Assignee: Sippican Ocean Systems, Inc.
    Inventors: Alan T. Hudson, David P. Gagnon, David W. Johns, II, William J. Langenhein, Jr.