Not taking that bet. From the linked wikipedia page.
According to reporting in Wired and Slate, the United States Patent and Trademark Office has at times considered applying secrecy orders to inventions deemed disruptive to established industries.
You may be sure that there are times when they did more than consider it.
Anyone want to bet that there are inventions that are great but would cost some people serious money and that’s why we’re not seeing them?
Not taking that bet. From the linked wikipedia page.
You may be sure that there are times when they did more than consider it.