Mark W. Allen, a member of the Oolahline Hair Grower Co., of Detroit, Mich., registered the word "Oolahline" as a trademark for a "Hair Tonic & Dandruff Cure" in 1899 (TM 33,915). He said he had been selling it since 1889. His business was located at 251 Woodward Avenue, in Detroit. On the trademark petition Mark was listed as the Sole Proprietor.