Patents by Inventor C. Tom Allen

C. Tom Allen 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).

  • Portable underwater signalling transducer
    Patent number: 4095667
    Abstract: A portable underwater signalling apparatus for use by divers having self-contained underwater breathing apparatus (scuba) to signal to other divers as well as surface and underwater vessels. The apparatus utilizes compressed air from the diver's tanks to drive a hammer against a diaphragm to cause sound waves to be transmitted through the water.
    Type: Grant
    Filed: January 19, 1977
    Date of Patent: June 20, 1978
    Inventors: Joseph Mahig, C. Tom Allen