Bibliography Details

Bouwers, Albert, Johannes Becker, and Adriaan Hendrik van Gorum. 1950. Reflecting Type Telescope Having a Spherical Mirror. U.S. Patent 2,504,383, filed December 18, 1945, and issued April 18, 1950. https://patents.google.com/patent/US2504383.

The following is a complete listing of all citations using this source:

§ 1.3. Final Pieces Fall into Place

§ 5.1. Product Refinements

Timeline

John Gregory’s Adaptation of Maksutov’s Design, Patent Constraints, and Braymer’s Location of the Questar Telescope’s Secondary Spot