Patents by Inventor Gerrit C. Verkade

Gerrit C. Verkade 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).

  • Device for and method of providing marks on an object by means of electromagnetic radiation
    Patent number: 5406042
    Abstract: In a marking system a pattern of marks present in a mask (30) is transferred to the surface (51) of an object (50) by causing radiation to act on the surface (51) via a mask (30). By adapting the shape and the area of the cross-section of the radiation beam to the pattern to be shown, the pattern is irradiated at a high intensity while the amount of radiation falling outside the pattern is reduced. This is achieved by adapting the cross-section of the beam by means of an exchangeable optical guide and/or cylindrical lenses (21, 22) and/or by stepwise scanning the mask (30) in one or two directions by means of a scanning system (23, 24) while the irradiated parts (I.sub.1, . . . , I.sub.n) overlap each other to a considerable extent.
    Type: Grant
    Filed: October 4, 1990
    Date of Patent: April 11, 1995
    Assignee: U.S. Philips Corporation
    Inventors: Adrianus R. C. Engelfriet, Gerrit C. Verkade, Sipke Wadman
  • Method of cleaving a brittle plate and device for carrying out the method
    Patent number: 5132505
    Abstract: A method and a device for cleaving a plate of a brittle material, such as, for example, glass, by means of a radiation beam repeatedly moving over the plate. The radiation beam is repeatedly passed over a desired track until the plate has been cleaved along a desired line of rupture of the plate.
    Type: Grant
    Filed: March 4, 1991
    Date of Patent: July 21, 1992
    Assignee: U.S. Philips Corporation
    Inventors: Maarten H. Zonneveld, Jacobus N. Dekker, Gerrit C. Verkade, Ireneus H. T. Fierkens, Theodorus J. M. J. Van Gennip