Patents by Inventor Gotz U. Wittek

Gotz U. Wittek 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).

  • Self-sealing retractable writing implement
    Patent number: 4859103
    Abstract: A writing implement including a sleeve-shaped housing and an automatic closure mechanism for the nib. The actuating element has a shift mechanism 3', the spring 10 biasing the writing element 2 against the housing bears on the inner sleeve 104, that the shift mechanism 3' engages the outer sleeve assembly 41, that the return force of the spring 10 biasing the writing element 2 against the inner sleeve 104 is smaller than that of a spring 9 which biases the inner sleeve 104 against the outer sleeve assembly 41. Additionally the actuating element consists of two actuating members displaceable axially with respect to each other, of which the first actuating member 120 acts on the intermediate sleeve 104 and the second actuating member 108 acts on the writing element 2, carries the shift mechanism 3' and is actuated by the first actuating member 120.
    Type: Grant
    Filed: March 16, 1987
    Date of Patent: August 22, 1989
    Inventor: Gotz U. Wittek