The Jacobs Specialties Manufacturing Co.

Denver, CO - This company appears to only have been active a short time, approximately 1917 - 1922.  Owner appears to have been Joseph H. Jacobs, a prolific inventor.

Google Patents for Joseph H. Jacobs

Patent #1,372,027, Joseph H. Jacobs - Machinist Vise, Assigned to Jacobs Specialties 3/22/1921