Patents/Inventors

Ray Steven Spratt

Petaluma, CAUS2 patents

3 Patents

US122875362025
Progressive Spectacle Lens
Carl Zeiss Vision International GmbH
0 cites
US120010872024
Progressive Spectacle Lens
Carl Zeiss Vision International GmbH
0 cites
US117822932023
Progressive Addition Lens for Myopia Control and Method of Manufacturing the Same
Carl Zeiss Vision International GmbH
0 cites