Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 5524354 | Probe element for coordinate measurement systems In a probe element for coordinate measuring systems using micro-probe elements and piezo-resonators which change their resonance characteristics upon contact, the probe element has piezo-resonators arranged in a polygonal configuration. Micro-probe elemen... | 06/11/1996 |
