File:US1330701-Figure 1.png
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| Description |
English: Bubble-pipe |
| Date | |
| Source | https://www.google.com/patents/US1330701 |
| Author | John L. Gilchrist |
|
The text and illustrations of US patents published before March 1, 1989 are in the public domain unless the patent text contains a specific notice that portions are copyrighted. See 37 CFR 1.71(d), 37 CFR 1.84(s)
The original patent contains no such notice, so its contents are in the public domain. Note: This only applies to images published before March 1, 1989. Patents published after that date are most likely copyrighted, unless in the public domain for another reason, such as {{PD-ineligible}}. |
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 20:06, 26 December 2016 | | 1,672 × 720 (20 KB) | MichaelFrey | {{Information |Description ={{en|1=Bubble-pipe}} |Source =https://www.google.com/patents/US1330701 |Author =John L. Gilchrist |Date =1918 |Permission = |other_versions = }} {{PD-US-patent-no notice}} |
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