Patents by Inventor Henricus Petrus Wilhelmus Wolffensperger

Henricus Petrus Wilhelmus Wolffensperger 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).

  • Method of manufacturing a flash lamp
    Patent number: 3955866
    Abstract: The invention relates to a method of manufacturing a flash lamp comprising an envelope which is filled with thin strips of combustible material, in which a ball of the strip material is compressed to the desired shape in a tube by means of two dies and is annealed in that shape in a stress-free manner.
    Type: Grant
    Filed: August 9, 1974
    Date of Patent: May 11, 1976
    Assignee: U.S. Philips Corporation
    Inventors: Johannes Cornelis Antonie Vreeswijk, Henricus Petrus Wilhelmus Wolffensperger