In 1924 Vincent Bendix had acquired the rights to Henri Perrot 's patents for drum and shoe design .
Bendix manufactured both hydraulic brake systems and a vacuum booster TreadleVac for its production lines for decades .
In 1924 Bendix   had acquired the rights to Henri Perrot 's patents for drum and shoe design .
Bendix manufactured both hydraulic brake systems and a vacuum booster TreadleVac for its production lines for decades .