US Eyepiece Patents



US Eyepiece Patents referred to in Eyepiece Evolution Tree Diagram



13603 25SEP1855 ROBERT B. TOLLES
873870 17DEC1907 ALBERT KONIG _ RAMSDEN
873871 17DEC1907 ALBERT KONIG _ RAMSDEN
1159233 02NOV1915 ALBERT KONIG _ KONIG & VARIANTS
1478704 25DEC1923 HEINRICH ERFLE _ ERFLE II
1479229 13AUG1921 HEINRICH ERFLE_ ERFLE I
1699682 21APR1925 LUDWIG BERTELE _ BERTELE I
1759529 -1MAY1924 CHRISTIAN VON HOPE _ WIDE ANGLE ORTHO VARIANTS
1968222 14JUN1933 ROBERT RICHTER _ ASPHERIC WIDE ANGLE ORTHO
2206195 14DEC1938 ALBERT KONIG _ KONIG WIDE ANGLE VARIANTS
2217281 18JAN1939 ALBERT KONIG _ ORTHOSCOPIC & PLOSSL VARIANTS
2419151 30JUN1944 JOHN R. MILES _ ERFLE VARIANT
2423676 20NOV1943 FRED E. ALTMAN _ ERFLE VARIANTS
3390935 09APR1965 WRIGHT H. SCIDMORE _ ERFLE WIDE ANGLE VARIANT
4054370 18OCT1977 ANDORA. FLEISCHMAN _ BERTELE VARIANT (first computer optimized eyepiece)
4286844 01SEP1981 ALBERT NAGLER _ ULTRA-WIDE ANGLE FLAT FIELD, 2 VARIANTS
4482217 13NOV1984 ALBERT NAGLER _ PLOSSL VARIANT
4525035 25JUN1985 ALBERT NAGLER _ WIDE ANGLE SCIDMORE VARIANT
4747675 31MAY1988 ALBERT NAGLER _ ULTRA-WIDE ANGLE (NAGLER TYPE II)

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