You were right about Travis Bean actually.
Wikipedia tells us
In 1974, he partnered with Marc McElwee and Gary Kramer to start Travis Bean Guitars, which made high-end electric guitars and basses featuring machined aluminum necks, an unusual design that provided remarkable clarity and sustain. The aluminum center section ran through the instrument body, with the pickups directly mounted to the aluminum. The majority of these instruments featured solid koa wood bodies and humbucker pickups. Though praised for their sound, the use of aluminum necks also made Travis Bean guitars heavier than other electric guitars. Models included the Artist, Standard, Wedge (rare), and TB500 (rare) with single coil pickups.
Note: Gary Kramer. Apparently he went on to form Kramer guitars. There is some Travis Bean DNA in those guitars, but Kramer had to change some things to avoid lawsuits RE patents held by Travis Bean.
One of the first electric guitars made extensive use of aluminum
That's the Rickenbacker A22, fondly known as "the frying pan".
Here's a 1976 Travis Bean bass