A Carthage company has filed a mattress patent infringement lawsuit against the company that makes Beautyrest. Liggett-and-Platt claims Simmons Manufacturing Company has infringed on a coil spring assembly used in two Beautyrest product lines. 

Leggett and Platt wants a court to order Simmons to quit using the spring and to order Simmons to pay damages that are at least equal to patent royalty payments.