On this day in 1966 Jack Kritz, assignor to Janus Products Inc., was granted the patent for Portable Underwater Communication Unit. U.S. Patent No. 3,267,414.
This invention relates to underwater communication equipment. More specifically, this invention pertains to apparatus enabling communication, voice and/or code, between a plurality of underwater divers or between a diver and a vessel. Additionally, the invention contemplates the use of such apparatus as an underwater tracking or homing aid, and for diver location and safety purposes.
