Number | Name | Date | Kind |
---|---|---|---|
1317374 | Kuentzel | Sep 1919 | |
1534550 | Smith | Apr 1925 | |
2686018 | Courtney | Aug 1954 | |
3037717 | Thomasma et al. | Jun 1962 | |
3156392 | Johannes | Nov 1964 | |
3367589 | Chant, Jr. et al. | Feb 1968 | |
3589633 | Young et al. | Jun 1971 | |
4180118 | Vecchiarelli | Dec 1979 | |
4347423 | Katsuke et al. | Aug 1982 | |
4408916 | Burgert | Oct 1983 | |
4515490 | Marker, III | May 1985 | |
4717273 | Elderfield | Jan 1988 |
Number | Date | Country |
---|---|---|
314233 | Jun 1929 | GBX |
Entry |
---|
Schall, "Constant Force Paper Tensioner", IBM Technical Disclosure Bulletin, vol. 20, No. 9, pp. 3617-3618, 2/78. |