File:H_Hughes_Drill_Patent_1908_Filing.jpg
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Summary
DescriptionH Hughes Drill Patent 1908 Filing.jpg |
English: Patent filing by Howard Hughes (1908) for a two-cone drill bit, used for oil well drilling |
Date | |
Source | US Patent Drawing |
Author | Howard Hughes |
Licensing
Public domainPublic domainfalsefalse |
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country.
Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:H_Hughes_Drill_Patent_1908_Filing.jpg |
Items portrayed in this file
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1908
image/jpeg
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 15:10, 21 October 2019 | 511 × 843 (151 KB) | TomahF | User created page with UploadWizard |
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Metadata
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Author | Thomas Fehring |
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Date and time of data generation | 09:57, 21 October 2019 |
Date and time of digitizing | 09:57, 21 October 2019 |
DateTimeOriginal subseconds | 18 |
DateTimeDigitized subseconds | 18 |