| 1940 KOCH Draft Check And Control Patent Print |
| 1924 KOCH CAMILLE Baby Carriage Patent Print Art |
| 1943 FELIX KOCH Car Construction Patent Print |
| 1951 KOCH WILLIAM Bumper Guard Patent Print Art |
| 1931 JOSEF KOCH Sleeping Car Patent Print Art |
| 1961 FRITZ KOCH Magnet Toy Patent Print Art |
| 1935 FELIX KOCH Car Construction Patent Print |
| 1963 KOCH Simulated Vehicle Toy Patent Print Art |
| 1932 KOCH LYNN Propeller Patent Print Art |
| 1926 FELIX KOCH Articulated Car Patent Print Art |
| 1944 RUDOLF KOCH Aircraft Wing Patent Print Art |
| 1940 KOCH CHARLES Billiard Cue Patent Print Art |
| 1963 KOCH & SONS INC H Marine Float Patent Print |
| 1959 FRITZ KOCH Magnet Game Or Toy Patent Print |
| 1962 KOCH FRED Trailer Construction Patent Print |
| 1960 FRITZ KOCH Magnet Game Or Toy Patent Print |
| 1934 JOHN KOCH Toy Patent Print Art |
| 1928 KOCH WILLIAM Bridle Bit Patent Print Art |
| 1966 FRITZ KOCH Construction Toy Patent Print |
| 1938 LUDWIG KOCH Spelling Game Patent Print Art |
| 1922 GOTTHARDT KOCH Automobile Lock Patent Print |
| 1941 KOCH Airplane Construction Patent Print Art |
| 1924 EDWARD G KOCH Baby Carriage Patent Print |
| 1921 KOCH REINHOLD Insect Trap Patent Print Art |
| 1924 KOCH WILLIAM Rowlock Patent Print Art |
| 1920 GOTTHARDT KOCH Engine Lock Patent Print Art |
| 1969 KOCH Life Jacket Patent Print Art |
| 1939 KOCH Impulse Measuring Circuit Patent Print |
| 1924 KOCH HENRY Toy Sounding Wheel Patent Print |
| 1940 KOCH JR Bumper Extension Patent Print Art |
| 1940 KOCH Landing Gear And Control Patent Print |
| 1926 FELIX KOCH Side Bearing Patent Print Art |