Number | Name | Date | Kind |
---|---|---|---|
1339431 | Backhaus | May 1920 | |
3837377 | McJones | Sep 1974 | |
4153085 | Imler et al. | May 1979 | |
4527600 | Fisher et al. | Jul 1985 | |
4805674 | Knowlton | Feb 1989 | |
4860803 | Wells | Aug 1989 | |
4966206 | Baumann et al. | Oct 1990 | |
4987932 | Pierson | Jan 1991 |
Number | Date | Country |
---|---|---|
1130715 | Dec 1984 | SUX |
Entry |
---|
Public Service company of Colorado, Team NGV Natural Gas Vehicles Pamphlet (no date). |
Brochure of CNG Equipco (no date). |
Industry News, Natural Gas Fuels, Jan. 1993, pp. 6, 7 and 9. |
Industry News, Natural Gas Fuels, vol. 1, Iss. 1, Aug. 1992, pp. 6-9. |
Tri-Fuels Incorporated, Catalog at pp. 26, 52, and 53 (no date). |
Brochure of Natural Gas Resources, Inc. (no date). |
Brochure of Tri-Fuels Incorporated (no date). |