An interesting blast from the past piece of technology that was forerunner to modern music devices. This vintage radio hat was released in 1949. It was ahead of it's time but was well received at first. Due to technical limitations the company stopped advertising it in 1950. People thought it was a great idea but it did not work very well. It wasn't very subtle or portable either. This was not an entirely new idea either. Similar radio devices had been around since 1922 with limited success. An American magazine named 'Modern Mechanics' published a story about a similar radio hat by a Berin inventor in 1930. In 1922 an inventor named H. Day was photographed with an adapted radio top hat.
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Here is a very entertaining book that features lots of cool and interesting inventions. Great reading!