Patents by Inventor Roumen Ratchev

Roumen Ratchev 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).

  • STRESS-MINIMISING ELECTRICAL THROUGH-CONTACT
    Publication number: 20150194756
    Abstract: The invention relates to a contact element (10) with a plug side (14) and a solder side (16) to be contacted with a circuit board or a carrier substrate. The contact element (10) is produced from an Al/Cu material composite (36), the Cu portion (42) of which forms the plug side (14) and the Al portion (44) of which forms the solder side (16) of the contact element (10).
    Type: Application
    Filed: July 24, 2013
    Publication date: July 9, 2015
    Applicant: Robert Bosch GmbH
    Inventors: Friedhelm Guenter, Reiner Ramsayer, Andreas Fix, Michael Guyenot, Roumen Ratchev