| 1968 CLARK GUDMUNDSON Boat Trailer Patent Print |
| 1968 CLARK Lighting Trailer Unit WHITE Patent 48272 |
| 1968 CARMELO Hand Towable Boat Trailer Patent |
| 1968 LANGE NORMAN Boat Trailer Patent Print Art |
| 1968 EHRLICHMANN Trailer Sled Snowmobile Patent 48269 |
| 1968 GOODWIN Side Dumping Trailer Patent Print |
| 1968 ROSS Bottom Dump Trailer Structure Patent |
| 1968 STAFFORD Ornamental Design Trailer Patent 48261 |
| 1968 LARSSON IVAR Camping Trailer Patent Print |
| 1968 BALDWIN HOWARD Trailer Steps Patent Print |
| 1968 BONTRAGER LLOYD Camping Trailer Patent |
| 1968 PELSUE Design Equipment Trailer Patent 48263 |
| 1968 FLAJOLE WILLIAM Camping Trailer Patent |
| 1968 BROWN Expandable Camping Trailer Patent |
| 1968 WATSON Trailer Dolly Ornament Design Patent 26407 |
| 1968 THORNTON Trailer Dolly Lift System Patent |
| 1968 DENDY JACK Hopper Trailer Patent Print Art |
| 1968 BOYD NELSON Trailer And Hoist Patent Print |
| 1968 HULVERSON Trailer Construction Patent Print |
| 1968 FRUEHAUF CORP Trailer Construction Patent |
| 1968 GARNETT EDWARD Reel Trailer Patent Print |
| 1968 SUEOKA HERBERT Trailer Patent Print Art |
| 1968 SCHULTZ HAROLD Foldable Trailer Patent |