Image:Dardick terra-drill pat 4004642 fig1.png
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[edit] Summary
Figure 1, US patent 4,004,642, for the Terra-drill, by David Dardick
[edit] Licensing
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This work is in the public domain in the United States because it is a work of the United States Federal Government under the terms of Title 17, Chapter 1, Section 105 of the US Code. See Copyright. Note: This only applies to works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. |
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 21:12, 24 May 2007 | 270×773 (52 KB) | Fluzwup (Talk | contribs) | (Figure 1, US patent 4,004,642, for the Terra-drill, by David Dardick) |
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