Manufacturing Co. (Buffalo, NY) - This company has it's beginnings back to at least 1883.  Articles of incorporation filed 5/10/1900 by Gustav A. Schaefer and Charles A. Haist.  In September of 1892, the following directors were elected: G. A. Schaefer - Pres., H. L. Schaefer - TREAS., George J. Metzger - VP., Charles A. Haist - SEC., and Carl Bohn.

In April of 1893, the building they occupied (Jones Building) was almost completely destroyed by fire.

Foster A. Haist - President of the company (perhaps former?) committed suicide in 1937 for fear of being a semi-invalid.

Charles H. Meyers Patent #288,098 - Wrench

Charles H. Meyers Patent #446,072 - Combined Ratchet-Wrench and Screw driver - Assigned to Keystone

Charles H. Meyers Patent #446,073 - Ratchet Wrench & Drill- Assigned to Keystone

Charles H. Meyers Patent #446,074 - Attachment for metal planers- Assigned to Keystone

Charles H. Meyers Patent #446,075 - AttacCombined Ratchet-Wrench and ​boring bit- Assigned to Keystone

Charles J. Scholler Patent #1,021,558 - Hand Ratchet for Drills, Etc. - Assigned to Keystone

Jacob Emig Patent #539,423 - Ratchet Drill - Assigned to Gustavus A. and Henry L. Schaefer

Charles Henry Meyers Patent #869,255 - Wrench

Edward M. Swartz Patent #1,477,302 - Garden Tool - Assigned to Keystone

Edwin S. Miller Patent #1,534,537 - Holder for Socket - Wrench Sets - Assigned to Keystone

Edwin S. Miller & Foster A. Haist​ Patent #1,696,444 - Holder for Socket Wrench Sets - Assigned to Keystone.

Edwin S. Miller & Foster A. Haist Patent #1,671,159 - Holder for Socket Wrench Sets - Assigned to Keystone.

Foster A. Haist Patent #1,761,263 - Method of Making Ratchet Wrenches - Assigned to Keystone

Foster A. Haist Patent #2,107,568 - Ratchet Wrench (Self Assigned) - By this time, Foster appears to have been employed by J. H. Williams.  

Foster A. Haist Patent #2,112,840 - Method of Making Wrenches (Adjustables) - Assigned to J. H. Williams.

Charles H. Chur Patent #2,199,984 - Wrench Set Holder - Assigned to Keystone

Edward A. Wenk and Ruth B. Wenk Patent #2,424,871 - Tool for flaring tubing - Assigned to Keystone

Sub Brands / Trade Names / Trademarks

• Champion (Wrenches)
• Westcott - Block Text (Pipe & Nut Wrenches) (First Use 4/4/1894 by Predecessor George N. Westcott [date is hard to read])
• Keystone (Wrenches, Ratchets, Socket Wrenches)
• Giant - Block Text (Hand Ratchets for drills, taps and wrenches) (First Use 9/16/1907)
• Nonparell (Ratchet Wrenches and Drills) (See here for description/article from 1894)
• Monarch - Block Text (Ratchets for operating hand drills, taps, wrenches and stud drivers) (First Use 3/26/1898)
• Keystone - Block Text (Ratchets for operating hand drills, taps, wrenches and stud drivers) (First Use 2/15/1894 [date is difficult to read])
• SocKit - Block Text (Kits of Socket Wrenches) (First Use 2/16/1924)