Old 4th Jun 2016, 12:30
  #1015 (permalink)  
Join Date: May 2016
Location: Another FBO !
Posts: 22
Current Patents.

Underwater Echoes
Filed August 21, 2012, by The Boeing Company.
Canadian patent not yet granted.

Aircraft "Buddy" System
Filed March 21, 2011, by Thales.
U.S. patent granted March 4, 2014.

The Floating Black Box
Filed August 26, 2010, by Lockheed Martin.
U.S. patent granted March 11, 2014.

As for "dye bags" or rather "Sea Marker Packet Inflatable Survival Equipment" are in/have been in wide-spread use for many years, but have not been adapted for Commercial Aviation. The question would be, "where would you put said item so that it could be maintained and deployed if ever required.

Further reading available at....

Patent 2843612 Summary - Canadian Patents Database

Patent US8666650 - Method and device for assisting in the locating of aircraft - Google Patents

Patent US8670879 - Automatically ejecting flight data recorder - Google Patents
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