File:US4347280.pdf
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United States Patent US 4,347,280 "Shock Absorbing Sheet Material"
Summary[edit]
| Description |
English: United States Patent US 4,347,280 "Shock Absorbing Sheet Material". This invention is useful for reducing shock from swinging baseball bats and racquet sports. |
| Date | |
| Source | United States Patent and Trademark Office as US 4,347,280, issued on August 31, 1982. |
| Author | Charles R. Lau, William Jensen, Perrin A. Allen |
Licensing[edit]
|
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}}. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 01:43, 19 February 2023 |  | 1,158 × 1,702, 5 pages (354 KB) | Nolabob (talk | contribs) | Uploaded a work by Charles R. Lau, William Jensen, Perrin A. Allen from United States Patent and Trademark Office as US 4,347,280, issued on August 31, 1982. with UploadWizard |
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