Lawyers for Dr. Henry Heimlich, inventor of the Heimlich maneuver, warned Monday that the doctor will sue anyone who performs his patented procedure without paying royalties. 'The Heimlich maneuver is a registered trademark of my client,' attorney Steve Greene said. 'We are prepared to protect Mr. Heimlich's proprietary rights, even if it means filing a legal injunction against any non-royalty-paying choking victims.' 