Utility Wrench Company
Utility Wrench Company (New York, NY) - Incorporated June 27, 1885. However, the NJ factory inspection report for 1884 shows their factory had 8 employees. Last mentioned as a wrench manufacturer in December, 1894.
Henry W. Atwater Patent #206,851 - Improvement in Clamps
Henry W. Atwater Patent #284,162 - Wrench
Article about their wrench from the August 1886 edition of Building and Carpentry.
Scientific American Bar Steel Version advertisement from December of 1887.