[5] The global branch was merged with the Landshut Willis company in Germany.
[4] In 1900, Willis & Co. acquired the major shares of the Lesage & Fils piano factory.
[7] In 1907, Willis & Co. purchased controlling interest in the Lesage Piano Company and the firm started producing “Willis & Company” brand pianos full time.
[4] On August 30, 1976, brand Willis (registered number:DE948592[10]) was approved by German Patent and Trade Mark Office.
[10] Willis' latest trademark update time took place on June 29, 2016,[11] whose current registered number is DE302016214832.