| 4460190 | Hand propelled wheelchair | July, 1984 | Spiess | 280/269 |
| 4410198 | Human powered vehicle | October, 1983 | Fernandes et al. | 280/281 |
| 4373740 | Three-wheel vehicle | February, 1983 | Hendrix | 280/269 |
| 4359231 | Steering mechanism for three-wheeled vehicles | November, 1982 | Mulcahy | 280/87.01 |
| 4333664 | Recumbent vehicle | June, 1982 | Turner et al. | 280/261 |
| 4303256 | Bicycle of the kind having the seat placed low so that the legs of the rider are substantially horizontal | December, 1981 | Mortensen | 280/261 |
| 4283070 | Recumbent bicycle | August, 1981 | Forrestall et al. | 280/274 |
| 4279429 | Vehicle with adjustable steering axis angle control | July, 1981 | Hopkins et al. | 280/267 |
| 4277078 | Three-wheel conveyance | July, 1981 | Root | 280/269 |
| 4198072 | Wheeled vehicle | April, 1980 | Hopkins | 280/267 |
| 3960392 | Children's runabout | June, 1976 | Read | 280/282 |
| D239644 | N/A | April, 1976 | Matsuura | D21/1 |
| 3921467 | Drive system for cycle | November, 1975 | Matsuura | 74/219 |
| 3920263 | Occupant-propelled vehicle | November, 1975 | Bundschuh | 280/106 |
| 3913929 | Low center of gravity cycle | October, 1975 | Matsuura | 280/7.14 |
| 3561778 | THREE WHEELED VEHICLE | February, 1971 | La Brie | 280/7.14 |
| 3429584 | THREE-WHEELED VELOCIPEDE | February, 1969 | Hendricks | 280/261 |
| GB2117719 | October, 1983 | 280/281LP |
FIG. 1 is a right side perspective view of a tricycle showing my new design.
FIG. 2 is a left side elevational view thereof.
FIG. 3 is a top plan view thereof.
FIG. 4 is a front elevational view thereof.
FIG. 5 is a rear elevational view thereof.