| 1940 KOCH Draft Check And Control Patent Print |
| 1967 KOCH Design Jet Producing Syringe Patent 33492 |
| 1924 KOCH CAMILLE Baby Carriage Patent Print Art |
| 1901 KOCH Shoe Lace Fastener BLOOM Patent 32606 |
| 1960 KOCH Journal Lubricating Device Patent |
| 1940 KOCH Frequency Responsive Relay Patent |
| 1943 FELIX KOCH Car Construction Patent Print |
| 1967 FELDMANN KOCH Ornamental Helmet ILC Patent 46903 |
| 1951 KOCH WILLIAM Bumper Guard Patent Print Art |
| 1942 KOCH Design Automobile Exhaust Shroud Patent 48788 |
| 1916 KOCH Cycle Lock ANGSTEN KOCH Patent 21904 |
| 1966 KOCH Design Wall Safe Cabinet Patent 44374 |
| 1909 KOCH Coin Controlled Mechanism REGINA Patent 20638 |
| 1931 JOSEF KOCH Sleeping Car Patent Print Art |
| 1938 KOCH Design Vehicle Exhaust Shroud Patent 48967 |
| 1938 KOCH Automobile Exhaust Shroud Design Patent 48970 |
| 1948 KOCH Design Ventilating Unit BLOWER Patent 30432 |
| 1961 FRITZ KOCH Magnet Toy Patent Print Art |
| 1938 KOCH Exhaust Shroud Design Automobile Patent 48966 |
| 1935 FELIX KOCH Car Construction Patent Print |
| 1912 PHILLIPS Like ANGESTEN-KOCH Patent 21695 |
| 1889 PETRI Design Album Book KOCH Patent 40761 |
| 1936 KOCH Design Automobile Exhaust Shroud Patent 49112 |
| 1950 KOCH Heat Treating Furnace ELECTRIC Patent 32071 |
| 1963 KOCH Simulated Vehicle Toy Patent Print Art |
| 1932 KOCH LYNN Propeller Patent Print Art |
| 1926 FELIX KOCH Articulated Car Patent Print Art |
| 1937 KOCH Design Automobile Exhaust Shroud Patent 49055 |
| 1938 KOCH Automobile Exhaust Shroud Patent 48971 |
| 1965 KOCH & SONS INC H Canopy Release Patent |
| 1944 RUDOLF KOCH Aircraft Wing Patent Print Art |
| 1940 KOCH CHARLES Billiard Cue Patent Print Art |
| 1939 KOCH Automobile Exhaust Shroud Design Patent 48928 |
| 1938 KOCH Design Exhaust Shroud Automobile Patent 48968 |
| 1963 KOCH & SONS INC H Marine Float Patent Print |
| 1889 HAFELY Design Album Book KOCH Patent 40757 |
| 1959 FRITZ KOCH Magnet Game Or Toy Patent Print |
| 1940 KOCH Design Automobile Exhaust Shroud Patent 48879 |
| 1879 KOCH Washing And Bathing Tub Bathtub Patent 10292 |
| 1962 KOCH FRED Trailer Construction Patent Print |
| 1961 KOCH ROBERT Game CADACO ELLIS INC Patent |
| 1938 KOCH New Automobile Exhaust Shroud Patent 48965 |
| 1962 KOCH ENG CO INC Trailer Construction Patent |
| 1960 FRITZ KOCH Magnet Game Or Toy Patent Print |
| 1967 KOCH Sandglass Timer Design Patent 9105 |
| 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 |
| 1923 LYDIA B KOCH Cinematographic Target Patent |
| 1924 EDWARD G KOCH Baby Carriage Patent Print |
| 1899 ESCHEMANN Indicator Lever Letter KOCH Patent 24376 |
| 1921 KOCH REINHOLD Insect Trap Patent Print Art |
| 1938 KOCH Original Design Exhaust Shroud Patent 48964 |
| 1963 KOCH & SONS INC H Canopy Spiller Patent |
| 1924 KOCH WILLIAM Rowlock Patent Print Art |
| 1920 GOTTHARDT KOCH Engine Lock Patent Print Art |
| 1938 KOCH Design Automobile Exhaust Shroud Patent 48969 |
| 1969 KOCH Life Jacket Patent Print Art |
| 1855 KOCH Paper Box Patent 20460 |
| 1939 KOCH Impulse Measuring Circuit Patent Print |
| 1924 KOCH HENRY Toy Sounding Wheel Patent Print |
| 1959 KOCH WOLFGANG Magnet Game Or Toy Patent |
| 1940 KOCH JR Bumper Extension Patent Print Art |
| 1932 KOCH SR Timepiece LOUIS GRAY M Patent |
| 1886 HORN Design Name Plate KOCH Patent 29176 |
| 1889 PETRI Leaves Design Book Album KOCH Patent 40762 |
| 1940 KOCH Landing Gear And Control Patent Print |
| 1939 KOCH Design Automobile Exhaust Shroud Patent 48927 |
| 1960 KOCH WOLFGANG Magnet Game Or Toy Patent |
| 1952 KOCH Practice Target For Putting Patent |
| 1941 KOCH WINFIELD Metronome RCA CORP Patent |
| 1889 PETRI Original Design Book Album KOCH Patent 40763 |
| 1926 FELIX KOCH Side Bearing Patent Print Art |
| 1967 KOCH Design Dental Jet Producing Unit Patent 33491 |
| 1938 KOCH Automobile Design Exhaust Shroud Patent 48972 |
| 1951 KOCH Canopy Releasing Mechanism Patent |