Analysis of information sources in references of the Wikipedia article "Acoustic-electric guitar" in English language version.
The other major brand offering factory installed, full systems (pickup and integrated preamp) in the '70s was Ovation. Designed by an Ovation engineer named James Rickard, their innovative pickup was issued U.S. Patent No. 3,712,951 in 1973.
Takamine first introduced the PT-007S in 1979, and the model was an instant success, especially among touring guitarists playing in the bigger country groups out of Nashville. Factory equipped with Takamine's new Palathetic pickup and an onboard, battery-powered preamp/EQ,
