1899: Hotz s'Jacob & Co trade registration, Hong Kong Government Gazette, 1899, The Snake Brand
1900: Hotz s'Jacob & Co.: 1900 trade mark registration - two men fishing
1900: Hotz s'Jacob & Co.: 1900 trade mark registration - Nine Chinese Lady Musicians sitting under a tree
1900: Hotz s'Jacob & Co.: 1900 trade mark registration - flowers and fruit
1900: Hotz s'Jacob & Co.: 1900 trade mark registration - dancing man holding a coin
1900: Hotz s'Jacob & Co.: 1900 trade mark registration - flower and butterfly
1900: Hotz s'Jacob & Co.: 1900 trade mark registration - two ladies from Hunan
1900: Hotz s'Jacob & Co.: 1900 trade mark registration - woman, man, horse
1900: Hotz s'Jacob & Co.: 1900 trade mark registration - traditional archery
1917: Holland-China Trading Company: Hong Kong Government Gazette trade registration, 1917
1920: Chinese order of the Golden Rice Blade, issued to Willem Kien, 1920
1920: Chinese order of the Golden Rice Blade, issued to Willem Kien, 1920