Patents by Inventor Theodore M. Perry

Theodore M. Perry 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).

  • Signal bladder
    Patent number: 4240371
    Abstract: A signalling device for underwater divers, in the form of an inflatable bladder held within a container and attached to a reel. The device can be attached to a diver, being strapped to his arm or to his air tank, for example. The device can be actuated by pulling a handle, which releases a gas cartridge to inflate the bladder as it is simultaneously released from the container to float to the surface. Rescuers can then follow the line down to the reel to locate the diver.
    Type: Grant
    Filed: August 17, 1979
    Date of Patent: December 23, 1980
    Inventor: Theodore M. Perry