| Number | Name | Date | Kind |
|---|---|---|---|
| D273510 | Mayor | Apr 1984 | |
| D334967 | Kitsuda | Apr 1993 | |
| 1694904 | Anderson | Dec 1928 | |
| 3046785 | Au Werter | Jul 1962 | |
| 3248946 | Lichtenberg et al. | May 1966 | |
| 4022062 | Basel et al. | May 1977 | |
| 4440028 | Ramlow | Apr 1984 | |
| 4557216 | Demyon | Dec 1985 | |
| 4561305 | Tremain et al. | Dec 1985 | |
| 4981040 | Lin | Jan 1991 | |
| 5052224 | Ford et al. | Oct 1991 |
| Number | Date | Country |
|---|---|---|
| 2115936 | Sep 1983 | GBX |
| Entry |
|---|
| Liberator/Stroller Brochure for Liquid Oxygen Systems by Gyogenic Associates; Jan. 1984; pp. 1-4. |