Patents by Inventor Otto Kaufmann

Otto Kaufmann 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).

  • Cymbal system
    Patent number: 6617501
    Abstract: In a cymbal system (1, 1″, 8, 15) comprising at least one cymbal (1), successive elevations (6) and indentations (7) are formed on the curved cymbal (1) in the circumferential direction. The elevations (6) and indentations (7) extending in the circumferential direction are disposed at a distance R2 from the outer edge (3) of the main body (1′). This waviness allows the compressed air to escape when the upper and lower cymbal are struck together when they are played. A retarding air cushion does not form and a clear, hard sound is generated.
    Type: Grant
    Filed: December 3, 2001
    Date of Patent: September 9, 2003
    Assignee: Roland Meinl Musikinstrumente GmbH & Co.
    Inventor: Otto Kaufmann
  • Cymbal system
    Publication number: 20020066356
    Abstract: In a cymbal system (1, 1″, 8, 15) comprising at least one cymbal (1), successive elevations (6) and indentations (7) are formed on the curved cymbal (1) in the circumferential direction. The elevations (6) and indentations (7) extending in the circumferential direction are disposed at a distance R2 from the outer edge (3) of the main body (1′).
    Type: Application
    Filed: December 3, 2001
    Publication date: June 6, 2002
    Applicant: Roland Meinl Musikinstrumente GmbH & Co.
    Inventor: Otto Kaufmann
  • Manufacture of concentrated solutions, having a low salt content, of cobalt and chromium 1:2 complex dyes which are free from sulfonic acid groups
    Patent number: 4180502
    Abstract: A process for the manufacture of concentrated solutions, having a low salt content, of o,o'-dihydroxy-or o,o'-dihydroxycarboxy-cobalt and -chrominum 1:2 complex dyes which are free from sulfonic acid groups, wherein the metallizing is carried out in water and a solvent of the formula I ##STR1## where X is hydrogen or methyl, m is 0 or 1, n is 1, 2 or 3 and R and R.sup.1 independently of one another are hydrogen or alkyl of 1 to 4 carbon atoms, in the presence or absence of additional solvents, and in the presence of water-soluble salts.
    Type: Grant
    Filed: October 2, 1978
    Date of Patent: December 25, 1979
    Assignee: BASF Aktiengesellschaft
    Inventor: Otto Kaufmann