Grant Manufacturing & Machine Co. manufactured a bench screw slotter in 1904, a speed lathe in 1909 and rivet spinning machines, automatic chamfering machines, automatic threading machines, and rotary vibrating riveters in the early 1940s.

Information Sources

• 1909 Hendricks' Commercial Register of the United States lists Grant Mfg. & Machine Co., Bridgeport, Conn., as manufacturers of tool post grinders, speed indicators (revolution counters), speed lathes ("Spencer"), envelope sealing machines, filing machines, rivet spinning machines, riveting machines, tapping machines (automatic), patterns and models (metal, experimental, etc.), spark plugs ("Empire"), screw machine products, and sheet metal stampings.
• 1909 Motor Cycle, Motor Boat & Automobile Trade Directory lists "Grant Mfg. & Machine Co., The, 90 Silliman Ave., Bridgeport, Conn., ('Grant' rivet spinning machines; 'K-B' die filing machines.)"
• December 1926 Western Machinery World page 48, "Where to Buy It in the West" advertising section, text ad: "The Grant Mfg. & Mach. Co. / Bridgeport, Conn. / Noiseless Riveting Machines, Pneumatic Riveting Machines, Vibrating Riveting Machines, Automatic Bicycle Chain Riveters, Automatic Chamfering, Drilling and Threading Machines. / Stocked by Smith-Booth-Usher Co. / San Francisco / Los Angeles".