A co-publishing agreement means that while the music publisher has ownership in the copyright and administers its exploitation, another publisher (possibly a songwriter’s own company) controls the other piece of the publisher’s share of ownership. This type of agreement often happens when established songwriters who have a lot of power within the industry establish their own publishing entity and enter in an agreement with another publisher.

The Evolution Of The Electric Guitar
The first electric guitars were made in the 1930’s in response to a demand from guitarists in bands whose rhythmic stylings could not be heard above the other instruments.
