Kogner Bros. Inc., Tryne Game Division, East Paterson, N.J., circa 1960's.
(cardboard box 5.6" x 9" x 13/16" with plastic tray, booklet, and 7 plastic pieces;
assembles to a 5.4 inch square by 3/16 inches thick;
the problems in the booklet are similar to the Richter 10 Cross Puzzle booklet;
the box and booklet are not dated,
but the booklet references a copyright 1961 version of the Tangram that it calls "Pythagoras")