Bibliography Details

Questar Corporation. 1977. Catadioptric Lens System. U.S. Patent 4,061,420, filed May 6, 1976, and issued December 6, 1977. https://patents.google.com/patent/US4061420.

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

§ 5.3. More Variations on a Theme

• Citation No. 1
• Citation No. 2

Timeline

• Citation No. 3
• Citation No. 4