Patents by Inventor Stephen J. Bolema

Stephen J. Bolema 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).

  • Stimulator for inkjet printer
    Patent number: 4668964
    Abstract: A method of assembling a stimulator for an inkjet printer by attaching separate piezoelectric elements to a plastic or metallic membrane sheet which sheet, after encapsulation of the piezoelectric transducers, may be cut into a plurality of stimulators. Each individual stimulator which now comprises a membrane, a piezoelectric element, and the encapsulating material can then be bonded to an ink fluid cavity.
    Type: Grant
    Filed: November 4, 1985
    Date of Patent: May 26, 1987
    Assignees: Ricoh Company, Ltd., Ricoh Systems, Inc.
    Inventors: Marco Padalino, Stephen J. Bolema, Mark A. Culpepper