FK

Ferdinand Kellner

Overall (1982): #14,399 of 81,411Top 20%
2
Patents 1982

Issued Patents 1982

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4319815 Prism view finder for reflex cameras with built-in exposure meter 1982-03-16
4319816 Prism viewfinder for reflex cameras with built-in light meter 1982-03-16