rfdong Posted March 10, 2017 Report Share Posted March 10, 2017 (edited) Couple of questions. Of the blades available now, what's the difference in action between the shakee with or without holes? When does the Z man patent expire? Anyone know? and thirdly, anyone got any old stock coffin style blades they want to sell? If so email me rfdong@sbcglobal.net thanks Rob Edited March 10, 2017 by rfdong Quote Link to comment Share on other sites More sharing options...
JLS Posted March 10, 2017 Report Share Posted March 10, 2017 I do not know the difference between the blades with or without holes, I have only used the ones with holes. A patent is good for 20 years and the patent holder has the option to renew it rather than let it expire. Quote Link to comment Share on other sites More sharing options...
