| 1950 O'CONNOR ARTHUR Spring Device Patent Print |
| 1950 SINGER MFG CO Tension Device Patent Print |
| 1950 MERKEL JOSEPH Timing Device Patent Print |
| 1950 DAWSON JOHN Dice Game Device Patent Print |
| 1950 HEIGIS HENRY Inflation Device Patent Print |
| 1950 TALBOYS HENRY Set Off Device Patent Print |
| 1950 DEAL Adjustable Locking Device Patent Print |
| 1950 ARMSTRONG Air Blast Device Patent Print Art |
| 1950 PIRON Motion Damping Device Patent Print |
| 1950 SYMONDS RALPH Towing Device Patent Print |
| 1950 WOLF CARL Magnetic Game Device Patent Print |
| 1950 DYKE LOUIS Turfing Device Patent Print Art |
| 1950 WATSON HUGH Aerial Device Patent Print Art |
| 1950 GARRAWAY Oil Projecting Device Patent Print |
| 1950 JOE Golf Ball Teeing Device Patent Print |
| 1950 BJERKE Caster Centering Device Patent Print |
| 1950 PHILIPPE Escapement Device Patent Print Art |
| 1950 JOSEPH Crown Sealing Device Patent Print |
| 1950 MCK Offset Printing Device Patent Print Art |
| 1950 GRIFFIN Boat Propelling Device Patent Print |
| 1950 RULE Impulse Emitting Device Patent Print |
| 1950 CLINE Airport Lighting Device Patent Print |
| 1950 NIENDORFF OTTO Timing Device Patent Print |
| 1950 SCHUELKE WALTER Mooring Device Patent Print |
| 1950 WHITING Golf Training Device Patent Print |
| 1950 FFORD Clock Display Device Patent Print Art |
| 1950 HAMILTON Time Control Device Patent Print |
| 1950 BURKHARDT Lifesaving Device Patent Print |
| 1950 HICKMAN CLARENCE Arming Device Patent Print |
| 1950 OLDHAM Needle Threading Device Patent Print |
| 1950 MARSAC LEONARD Tension Device Patent Print |
| 1950 KUELLMAR Power Take Off Device Patent Print |
| 1950 ALFRED Needle Threading Device Patent Print |
| 1950 FRIEDRICH Air Outlet Device Patent Print |
| 1950 JOHNSON JOHN Aquatic Device Patent Print |
| 1950 CARPENTER Dispensing Device Patent Print |
| 1950 OSCAR ELIASSON Sealing Device Patent Print |
| 1950 SMITH HERBERT Centering Device Patent Print |
| 1950 JONES ERROL Racing Game Device Patent Print |
| 1950 BENT Brake Cylinder Device Patent Print Art |
| 1950 WILLIAM EDWARDS Oiler Device Patent Print |
| 1950 ROBBINS HOWARD Toy Device Patent Print Art |
| 1950 LIGHT DAVID Friction Device Patent Print |
| 1950 GRANGER ALBERT Rowing Device Patent Print |
| 1950 SOLOMON ADLER Threading Device Patent Print |