Patents by Inventor Etienne Langolis

Etienne Langolis 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).

  • Bridged electromechanical filters
    Patent number: 4197516
    Abstract: An electromechanical bandpass filter includes at least one real pole consisting of vibrating resonators and couplers between adjacent resonators arranged as filter cells connected in parallel. Each cell includes a coupler and a half of each of the adjacent resonators. At least one bridge extends over at least one resonator and the image mobility of the cells which are spanned by the bridge is equal to the image mobility of the cells in an unbridged electromechanical filter of the same type and having the same passband.
    Type: Grant
    Filed: April 19, 1978
    Date of Patent: April 8, 1980
    Assignee: Lignes Telegraphiques et Telephoniques
    Inventors: Herbert Ernyei, Etienne Langolis