The first match was accidentally discovered in 1826 when John Walker scraped a stick with chemicals on the end against a stone floor.
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| Number | Title | Issue Date |
| 4165747 | Microvascular clamps with suture retaining means Apparatus having parallel-closing jaws for clamping and immobilizing ends of blood vessels to be joined together by suturing without damaging the vessel walls. A spring biasing the jaws together is adjustable to exert no more than 30 gm/cm2 in ... | 08/28/1979 |