| 1930 CARLAND Golf Practicing Device Patent Print |
| 1930 STANLEY Safety Landing Device Patent Print |
| 1930 JEROME Crystal Setting Device Patent Print |
| 1930 LAMBDIN Buoy Launching Device Patent Print |
| 1930 ROWE Animal Feeding Device Patent Print Art |
| 1930 NICHOLS ARTHUR Sounding Device Patent Print |
| 1930 BARTLETT JOHN Amusement Device Patent Print |
| 1930 RUDOLPH JELINEK Display Device Patent Print |
| 1930 JOHN Battery Securing Device Patent Print |
| 1930 HARRISON HENRY Acoustic Device Patent Print |
| 1930 LOUIS BAUER Clamping Device Patent Print |
| 1930 JOHNSON Buoyant Bathing Device Patent Print |
| 1930 LOMBARD ALVIN Traction Device Patent Print |
| 1930 LADDON Duplex Operating Device Patent Print |
| 1930 FUGLE Cable Raising Device Patent Print Art |
| 1930 LONG Boat Salvaging Device Patent Print Art |
| 1930 ROBERT MILLAR Gripping Device Patent Print |
| 1930 DODGEM CORP Amusement Device Patent Print |
| 1930 HANSEN CHARLES Charging Device Patent Print |
| 1930 CARLAND Golf Practicing Device Patent Print |
| 1930 QUAIN ERIC Swimming Device Patent Print Art |
| 1930 MARKEY FRED Amusement Device Patent Print |
| 1930 ANDREW Marine Salvaging Device Patent Print |
| 1930 GIRARD ARTHUR Shipping Device Patent Print |
| 1930 JOHN WEGNER Whipping Device Patent Print |
| 1930 SCOTT Electric Alarm Device Patent Print |
| 1930 FRANK One Man Orchestra Device Patent Print |
| 1930 GRANT Car Retarding Device Patent Print Art |
| 1930 EMIL Animal Loading Device Patent Print Art |
| 1930 FRANK SIPOS Protective Device Patent Print |
| 1930 EMIL WEGNER Swimming Device Patent Print |
| 1930 LIVESAY EVERETT Lifting Device Patent Print |
| 1930 EMIL BAHR Alarm Device Patent Print Art |
| 1930 RANDOLPH GEORGE Lifting Device Patent Print |
| 1930 WESTINUS Propelling Device Patent Print Art |
| 1930 SWINEHART Interlocking Device Patent Print |
| 1930 NEELY Sound Producing Device Patent Print |
| 1930 SHAW Game Scoring Device Patent Print Art |
| 1930 LAMONT JESSE Signal Device Patent Print Art |
| 1930 DAVIS JOHN Impelling Device Patent Print |
| 1930 FRANCIS Aircraft Safety Device Patent Print |
| 1930 MCKEAN Yarn Tension Device Patent Print Art |
| 1930 LAWRENCE Propelling Device Patent Print Art |
| 1930 FREEMAN WALTER Loading Device Patent Print |
| 1930 STEELE Submarine Safety Device Patent Print |
| 1930 SWARTHOUT Golf Scoring Device Patent Print |
| 1930 MCCUNE Door Control Device Patent Print Art |
| 1930 KURT Aeroplane Safety Device Patent Print |
| 1930 PETER MARKUS Inflating Device Patent Print |
| 1930 CECIL MILLS Exercising Device Patent Print |
| 1930 COLLINS HALL Exercising Device Patent Print |
| 1930 JOHN STIERL Catching Device Patent Print |
| 1930 SHERRY JAMES Amusement Device Patent Print |
| 1930 LUZERN Aerial Amusement Device Patent Print |
| 1930 DE FREITAS Amusement Device Patent Print |
| 1930 SEXE AMMON Rerailing Device Patent Print |
| 1930 CRAPO JOHN Clamping Device Patent Print Art |
| 1930 HERMAN Theft Preventing Device Patent Print |
| 1930 FREDRIK LAUTERBACH Game Device Patent Print |
| 1930 HYNES FRANCIS Game Device Patent Print Art |
| 1930 LEON Watch Fastening Device Patent Print |
| 1930 ROSS BAXTER Playground Device Patent Print |
| 1930 KLEIN JOSEPH Signal Device Patent Print Art |
| 1930 PASCO Pedal Locking Device Patent Print Art |
| 1930 SELZER Ship Steering Device Patent Print |
| 1930 MILLS HARRY Car Loading Device Patent Print |
| 1930 PERKINS GEORGE Safety Device Patent Print |
| 1930 MIKUS Safety Swimming Device Patent Print |
| 1930 ALFRED COPONY Decking Device Patent Print |