A patch cable or patch cord connects one electronic devise to another. By using a patch cable, or patch cord, works by inserting one end into one device, and the other end into another. The wires in the cord will connect the two devices.

In electronics, the patch cord connects one stand alone piece of equipment to another. For instance, your printer has a patch cord to connect to your computer. Since the type of connection is generic, many electronic instruments do not have a special cord but a general one which may be purchased anywhere.

Just like an extension cord, the patch cord is not specific to any one instrument.

Yes the wireless patch for audio guitars and such have been invented for over 30 years

There are quite a bit of places that you can purchase a fiber optic patch cord from. Best Buy, Amazon, eBay, Walmart, Target, Belkin's official website, and Computer Cable Store for starters.

Guitar Patches or Patch Cords are simply just the cord going from the guitar to the amp.