フロイド・ローズ
US patent 4555970, Floyd D. Rose, "Tremolo apparatus capable of increasing tension on the strings of a musical instrument", issued 1985-12-03 - spring and claw mechanism;
US patent 4882967, Floyd D. Rose, "Tremolo apparatus having broken string compensation feature", issued 1989-11-28 - early patent for a tremstopper device;
US patent 4967631, Floyd D. Rose, "Tremolo and tuning apparatus", issued 1990-11-06 - patent for Floyd Rose Pro, low-profile version;