Great idea but to be quite serious it's doubtfull a person could ever get a patent on it .Matter of fact in the business I'm in we've been using some form of compressed gas or air since I started this line of work 42 years ago to launch lines through conduits .Like 4-500 feet of it and often...
I'd thought in passing of using a spud gun to loft a tennis ball with jet line tied to it .The guys that build them suggest using schedual 80 pipe for the spud tosser .
If nothing else it would be sport to shoot a cat out of a tree with a tennis ball .:lol: Ain't I rotton .
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