Patent US5443036 – Method of exercising a cat

Re:Patent US5443036 – Method of exercising a cat by monochromatic on Friday October 23, 2015 @11:47AM (#10439337)

Sounds like the idea is that the beam itself is invisible, and it becomes visible once it hits something. Poorly worded though.

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Re:Patent US5443036 – Method of exercising a cat by mikeash on Friday October 23, 2015 @01:20PM (#10439955)

So you can work around this patent with a fog machine?

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