For Six Years, One Man Was the Legal Owner of Gravity. The Patent Office Eventually Noticed.
In the early 1900s, a vaguely worded U.S. patent application slipped through the system and technically granted one inventor exclusive rights to a 'gravitational apparatus' so broadly defined that legal scholars later argued it covered the force of gravity itself. It took six years, several baffled court filings, and one very embarrassed patent examiner to fix it.