Number | Name | Date | Kind |
---|---|---|---|
1747799 | Straus | Feb 1930 | |
2586488 | Smith | Feb 1952 | |
3221743 | Thompson et al. | Dec 1965 | |
3572326 | Jensen | Mar 1971 | |
3823709 | McGuire | Jul 1974 | |
3910538 | Baitella | Oct 1975 | |
4254763 | McCready et al. | Mar 1981 |
Number | Date | Country |
---|---|---|
460145 | May 1928 | DE2 |
1235135 | May 1960 | FRX |
446439 | Mar 1949 | ITX |
Entry |
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Poly-Tract Retractor System of Minnesota Scientific Inc., Thompson Retractor by Richard C. Thompson, M.D. |
Codman & Shurtleff, Price List of Great Eastern Lumber Company, Inc. |