File:US1682572-1.jpg
Jump to navigation
Jump to search
Size of this preview: 399 × 599 pixels. Other resolutions: 160 × 240 pixels | 524 × 787 pixels.
Original file (524 × 787 pixels, file size: 81 KB, MIME type: image/jpeg)
 | This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. |
Summary
| Description | Patent for C. W. KEUFFEL OPTICAL INSTRUMENT (a direct reading spectrophotometer). |
| Date | |
| Source | https://patents.google.com/patent/US1682572 |
| Author | C. W. Keuffel |
This file is in PDF format.
Portable Document Format (PDF) is a file format created by Adobe Systems for document exchange. PDF is used for representing two-dimensional documents in a manner independent of the application software, hardware, and operating system. Each PDF file encapsulates a complete description of a fixed-layout 2D document that includes the text, fonts, images, and 2D vector graphics which compose the documents. The best way to view PDF files is locally using a reader.Several free readers for every system are available at pdfreaders.org. |
Licensing
|
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. |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 11:39, 11 February 2024 | | 524 × 787 (81 KB) | RaboKarbakian | {{Information |Description=Patent for C. W. KEUFFEL OPTICAL INSTRUMENT (a direct reading spectrophotometer). |Source=https://patents.google.com/patent/US1682572 |Date=1925-10-15 |Author=C. W. Keuffel |Permission= |other_versions= }} {{PDF}} Category:United States patent 1682572 Category:Carl W. Keuffel Category:Spectrophotometers |
File usage
The following 2 pages use this file:
