Excerpt from Avocado Memories:

Note: I mentioned above that I came up with the first pop culture tarot deck. I also invented the Walkman. In 1972, as I walked along the railroad tracks from Burbank Junction to Empire Avenue to pick up the family car after school, I reflected upon how nice it would be to have a small, battery-powered cassette deck connected to a small pair of headphones. I knew that headphones didn't require much in the way of amplification, and that a few transistors on a small circuit board would probably be sufficient. I figured the cassette mechanism and associated circuitry would probably be somewhat larger than a transistor radio. In 1972 I was 16. Sony introduced the Walkman to great acclaim in July, 1979 and revolutionized the way people listened to music. If only I had had the investment capital…..