Frank A. Hollenbeck was the Baker Gun & Forging plant superintendent 1890-1892. Hollenbeck had three patents granted while he was in Batavia, and two were assigned to Baker Gun & Forging; October 13, 1891 and August 23, 1892 Nos. 461182 and 481327. Dave or Daryl could ID the other patent date.

I took the liberty of adding the image to the PictureTrail, without the SN