Patents by Inventor Patrick F. Frain

Patrick F. Frain 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).

  • Double underwater speargun
    Patent number: 4759336
    Abstract: An underwater speargun consisting of two spears that are independent of each other. This underwater speargun is capable of 2 rapid discharges of spears or 2 simultaneous discharges of spears. Accidental firing is prevented due to the safety blocking the trigger until the trigger and the safety trigger are squeezed rearward at the same time. Grooved tracks and front spear guides help insure the spear propels out of the gun in a straight path.
    Type: Grant
    Filed: September 26, 1986
    Date of Patent: July 26, 1988
    Inventor: Patrick F. Frain