It is Royal’s policy to not invite or accept third-party disclosure or submissions of information (including patents or applications).
This information is provided in compliance with 35 U.S.C. 287(a). The Royal products appearing in the table below are covered by one or more of the U. S. Patent(s) listed in corresponding line. This listing is provided without prejudice, is subject to revision and other patents may also be relevant to a listed product or to a design based, in whole or in part, on a listed product.
ISSUED PATENTS - UNITED STATES