Patents Assigned to David Rozenvasser Ltd.
  • Patent number: 5361575
    Abstract: A jewelry rope chain having tightly interfitting links made of wire of a given cross-section, each link having a small gap formed therein, so as to enable one of said links to pass through the gap of a second link, said links being intertwined to fit tightly one against the other and form in-outward appearance a double helix, the improvement comprising each link having a wire cross-section including a major axis defining a longer dimension and a minor axis defining a shorter dimension, said longer dimension being in the plane of the link and the shorter dimension being perpendicular thereto, the ratio of said longer dimension to said shorter dimension being greater than 1.3:1 but less than 3:1.
    Type: Grant
    Filed: March 10, 1993
    Date of Patent: November 8, 1994
    Assignee: David Rozenvasser, Ltd.
    Inventor: David Rozenwasser
  • Patent number: D329205
    Type: Grant
    Filed: July 3, 1990
    Date of Patent: September 8, 1992
    Assignee: David Rozenvasser Ltd.
    Inventor: David Rozenwasser
  • Patent number: D339546
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: September 21, 1993
    Assignee: David Rozenvasser Ltd.
    Inventor: David Rozenwasser
  • Patent number: D343137
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: January 11, 1994
    Assignee: David Rozenvasser, Ltd.
    Inventor: David Rozenwasser
  • Patent number: D343138
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: January 11, 1994
    Assignee: David Rozenvasser, Ltd.
    Inventor: David Rozenwasser
  • Patent number: D343371
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: January 18, 1994
    Assignee: David Rozenvasser, Ltd.
    Inventor: David Rozenwasser
  • Patent number: D343588
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: January 25, 1994
    Assignee: David Rozenvasser, Ltd.
    Inventor: David Rozenwasser
  • Patent number: D343589
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: January 25, 1994
    Assignee: David Rozenvasser, Ltd.
    Inventor: David Rozenwasser
  • Patent number: D344040
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: February 8, 1994
    Assignee: David Rozenvasser, Ltd.
    Inventor: David Rozenwasser
  • Patent number: D344688
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: March 1, 1994
    Assignee: David Rozenvasser, Ltd.
    Inventor: David Rozenwasser
  • Patent number: D346130
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: April 19, 1994
    Assignee: David Rozenvasser, Ltd.
    Inventor: David Rozenwasser
  • Patent number: D347401
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: May 31, 1994
    Assignee: David Rozenvasser, Ltd.
    Inventor: David Rozenwasser
  • Patent number: D347597
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: June 7, 1994
    Assignee: David Rozenvasser, Ltd.
    Inventor: David Rozenwasser