Sub-series 1. Correspondence, 1933-1985

Arranged alphabetically by subject, this sub-series contains business correspondence files, which document the business activities of several Beckman Coulter corporate predecessors between the 1930s and 1980s. Most of the files were created by Beckman Instruments, Incorporated. A few files created by National Technical Laboratories, National Inking Appliance Company, Arnold O. Beckman, Incorporated, and Helipot Corporation are also included in this sub-series.

Much of the correspondence in this sub-series is between the firm and its customers (including federal government agencies), licensees, distributors, vendors, and business partners. This sub-series also contains correspondence generated by several company divisions and personnel. Correspondence regarding a number of individual issues affecting the Beckman concern, including, but not limited to, legal matters, facilities, personnel, and publicity are also found here.

The contents of the files in the Correspondence sub-series consist mainly of letters. A significant amount of accompanying materials, including, but not limited to, photographic materials, reports, notes, and blueprints, are found in this sub-series as well.