Patents Assigned to Hyperdesign, Inc. - Justia Patents Search

Patents Assigned to Hyperdesign, Inc.

Heat activated amusement device employing microencapsulated thermochromic liquid crystal

Patent number: 5223958

Abstract: A heat activated amusement device is stimulated, by the transfer of thermal energy from a person's body or a heated object, to reveal by color differentiation a hidden message or visual image.

Type: Grant

Filed: April 3, 1992

Date of Patent: June 29, 1993

Assignee: Hyperdesign, Inc.

Inventor: John F. Berry