Courvoisier & Wilcox Mfg. Co. Case Trademark Trademark Manufacturer: Courvoisier & Wilcox Mfg. Co. Manufacturer Years Active: 1883 - 1905 Trademark Markings: Essex 14 K. Columbia C.W.Mfg.Co. Trademark Issued: August 26, 1890 Other Courvoisier & Wilcox Mfg. Co. Trademarks