Modules for making generally twodimensional patterns

Claim 1

A DECORATIVE GENERALLY PLANAR STRUCTURE, COMPRISING A PLURALITY OF PERIPHERAL FRAME MEMBES OF CHANNELSHAPED CROSS SECTION WITH FIRST INTERLOCKING MEANS IN THEIR CHANNELS, A PLURALITY OF MODULE UNITS, COMPRISING A PLURALITY OF IDENTICAL FIRST MODULE UNITS AND A PLURALITY OF IDENTICAL SECOND MODULE UNITS DIFFERENT FROM AND COMPLEMENTARY TO SAID FIRST MODULE UNITS, EACH MODULE UNIT HAVING AT LEAST ONE STRAIGHT EDGE AND ONE CURVED EDGE, THE CURVED EDGES OF SAID FIRST MODULE UNITS BEING COMPLEMENTARY TO THE CURVED EDGES OF SAID SECOND MODULE UNITS, SAID FIRST AND SECOND UNITS BEING COMPLEMENTARY SEGMENTS OF AN ISOSCELES RIGHT TRIANGLE, EACH SAID STRAIGHT EDGE OF ALL SAID UNITS BEING INSERTABLE SNUGLY IN A SAID FRAME MEMBER FOR SUPPORT THEREBY, EACH SAID FIRST MODULE UNIT HAVING SECOND INTERLOCKING MEANS ON EACH EDGE THEREOF, EACH SAID SECOND MODULE UNIT HAVING THIRD INTERLOCKING MEANS ON EACH EDGE THEREOF, SAID SECOND AND THIRD INTERLOCKING MEANS ON SAID STRAIGHT EDGES BEING ENGAGEABLE WITH SAID FIRST INTERLOCKING MEANS AND WITH EACH OTHER, SAID SECOND AND THIRD INTERLOCKING MEANS ON SAID CURVES EDGES BEING INTERLOCKABLE WITH EACH OTHER, WHEREBY STRUCTURES OF VARIOUS DESIGNS MAY BE BUILT FROM SAID MODULES INTERLOCKING WITH EACH OTHER AND INTERLOCKING WITH AND SUPPORTED BY SAID FRAME MEMBERS, SOME OF SAID MODULE UNITS BEING INSERTED SNUGLY IN AND INTERLOCKED WITH SAID FRAME MEMBERS BY SAID INTERLOCKING MEANS, AND SOME OF SAID MODULE UNITS BEING ENGAGED WITH AND INTERLOCKED WITH EACH OTHER BY THEIR SAID INTERLOCKING MEANS TO COMPLETE SAID PLANAR STRUCTURE IN A SELECTED SAID DESIGN.