Patents by Inventor Frederick Mah

Frederick Mah 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).

  • Patent number: 4607543
    Abstract: A bottle opener with counter is described which is capable of removing crown or twist caps from beverage bottles and which has a digital display indicating the number of bottles opened during a certain period. It is of relatively simple construction and is hand-held, comprising a handle or body containing the counter and a head with bottle cap engaging structure. The application of leverage or torque in removal of a bottle cap causes the counter, which may be either mechanical or electronic, to be advanced.
    Type: Grant
    Filed: April 1, 1985
    Date of Patent: August 26, 1986
    Inventor: Frederick Mah