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Summary
| Description |
Català: Patent realitzada per Frank D. Williams en què observem els diferents passos del procés Williams. En la figura 1 veiem la reproducció d'un fotograma negatiu en blanc amb la silueta d'un nen de color negre; això seria equivalent al "holdout matte". En la figura 2 veiem la còpia inversa, amb el fons negre i la figura del nen blanca; com hauria de ser el "cover matte". En la figura 3 es superposa el negatiu de la figura 1 sobre una altra pel·lícula sense revelar, que funcionarà de fons, i s'imprimeix. En la figura 4 veiem el resultat final, on s'ha aplicat també el "cover matte" (figura 2) per emmascarar el fons, ja imprès, i revelar l'acció del personatge en el buit deixat anteriorment (figura 3). |
| Date | |
| Source | https://patents.google.com/patent/US1273435 |
| Author | Frank D. Williams |
Licensing
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In general, the contents of United States patents are in the public domain.
In specific cases, patent applicants and holders may claim copyright in portions of those documents. In those specific cases, applicants are required to identify the portions that are protected under copyright, and are additionally required to state the following within the body of the application and patent (see 37 CFR 1.71(d) & (e) and 37 CFR 1.84(s), and MPEP § 608.01(e) & (w) and MPEP § 1512):
The original patent should be checked for the presence of such language before an assumption is made that the contents are in the public domain. (This template can be replaced by {{PD-US-patent-no notice}} in such cases.)
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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.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 15:36, 18 November 2018 | | 2,320 × 3,408 (36 KB) | AnnaAstorza | User created page with UploadWizard |
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