The International Association of Bomb Technicians gives a pretty good summary at this link - it is a reprint from a 2004 Article in the Detonator Magazine.
http://www.nvcc.edu/home/llinville/LLbomber1.htm
Summary
"The Guy Fawkes emblem was originally designed by Mr. E. Kew of Borden, Ontario, Canada. The copyright was witnessed by Mr. Max Newhook (retired military) and Mr. Ron Madore (retired Royal Canadian Mounted Police)". The catalog also lists the intention of the copyright as being the same as mentioned in the letter of Yves Pelletier in The DETONATOR (Vol. 23, No. 1 - Jan./Feb. 96). "[/i]
Cheers
Paul