Number | Name | Date | Kind |
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4009884 | Weigl | Mar 1977 | A |
4248434 | Weigl | Feb 1981 | A |
4900027 | Sheridan | Feb 1990 | A |
4961581 | Barnes et al. | Oct 1990 | A |
5213334 | Yih | May 1993 | A |
5549301 | Gerrard | Aug 1996 | A |
5944314 | Stavinsky | Aug 1999 | A |
5954334 | Parker, Jr. | Sep 1999 | A |
6003870 | Johnson | Dec 1999 | A |
6059291 | Gary | May 2000 | A |
6155567 | Keleher | Dec 2000 | A |
6220597 | Scibetta | Apr 2001 | B1 |
RE37957 | Garfield | Jan 2003 |
Number | Date | Country |
---|---|---|
WO 9305855 | Apr 1993 | WO |
Entry |
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McLeod, John: Toepen, http://www.pagat.com/last/toepen.html.* |
McLeod, John: Spades, http://www.pagat.com/boston/spades.html.* |
Morehead et al.: The New Complete Hoyle Revisd, 1991, Doubleday, p. 129-159. |