Patents Assigned to ECNA LLC
  • Diamond cuts providing increased light amplification
    Patent number: 11576471
    Abstract: A sparkling, oblong-shaped precious stone, such as an emerald or cushion cut diamond is formed by a planar table facet, a girdle, two pairs of long crown facets located between the table facet and the girdle, and the two pairs of long pavilion facets located between the base of the stone and the girdle.
    Type: Grant
    Filed: February 4, 2021
    Date of Patent: February 14, 2023
    Assignee: ECNA, LLC
    Inventor: Christopher Slowinski
  • Gemstone
    Patent number: D813715
    Type: Grant
    Filed: October 5, 2016
    Date of Patent: March 27, 2018
    Assignee: ECNA LLC
    Inventor: Christopher Slowinski
  • Precious stone
    Patent number: D816541
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: May 1, 2018
    Assignee: ECNA LLC
    Inventor: Christopher Slowinski
  • Precious stone
    Patent number: D833324
    Type: Grant
    Filed: August 16, 2017
    Date of Patent: November 13, 2018
    Assignee: ECNA LLC
    Inventor: Christopher Slowinski
  • Gemstone
    Patent number: D897886
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: October 6, 2020
    Assignee: ECNA, LLC
    Inventor: Christopher Slowinski
  • Pear shape precious stone
    Patent number: D976747
    Type: Grant
    Filed: May 6, 2021
    Date of Patent: January 31, 2023
    Assignee: ECNA, LLC
    Inventor: Christopher Slowinski