NO... Patent and Copyright DO NOT RESTRICT knowledge (one can READ [and KNOW] EVERYTHING about someone's patent and copyrighted information)...
Those exist to PROTECT the HARD WORK (and BRILLIANCE) of the INVENTOR/CREATOR of that work object - from people who would come along and TAKE (without financial compensation) the object of that patent and/or copyright - for their own PROFIT!
Sounds kinda like GOVERNMENT (taking from the PRODUCERS and giving to the TAKERS, for doing NOTHING), doesn't it?!
AND, in THIS Patent/Copyright system, there is NOTHING to prevent YOU from working harder and being smarter than the LAST Patent/Copyright holder, and inventing/producing SOMETHING NEW (and different) that will make YOU RICH!
Go Do It!