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Summary
| Description |
English: Figure 2 from United States Patent 4,347,280 which is this file: File:US4347280.pdf
The figure depicts the cross section of a material designed to minimize the shock of impact of batting in baseball and also of racquet sports. It depicts the design of a poromeric material. |
| Date | |
| Source | This is an extracted image from File:US4347280.pdf which is already on the Wikimedia Commons. |
| Author | Charles R. Lau, William Jensen, and Perrin A. Allen |
Licensing
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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 | 18:39, 19 February 2023 | | 1,280 × 806 (153 KB) | Nolabob | Uploaded a work by Charles R. Lau, William Jensen, and Perrin A. Allen from This is an extracted image from File:US4347280.pdf which is already on the Wikimedia Commons. with UploadWizard |
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