Number | Name | Date | Kind |
---|---|---|---|
1324551 | Ireland | Dec 1919 | |
1591299 | Etherton | Jul 1926 | |
2325612 | Kirkpatrick | Aug 1943 | |
3557927 | Wright et al. | Jan 1971 | |
3970185 | Shelton | Jul 1976 | |
4307970 | McGaughey, Jr. et al. | Dec 1981 | |
4765764 | Lefler | Aug 1988 |
Number | Date | Country |
---|---|---|
2542888 | Sep 1984 | FRX |
Entry |
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IBM Technical Disclosure Bulletin vol. 19 No. 9 Feb. 1977; "Stenographic Reading Device", Proceedings of the Annual Meeting of the Association for Computing Machinery, 1973; R. Smith, Northwestern University. |