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Exploring “pencil sharpener patents”

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scholarworks.uni.edu ↗

History & Culture

FOUND ONscholarworks.uni.edu ↗

What can 6,000 pencil sharpeners reveal? One collector documented their patents, inventors and designs.

For many years, Dr. Paul D. Whitson, Emeritus Professor, taught biology and ecology at UNI, beginning in 1972. Following his retirement in 2005, he undertook the research and documentation of…

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Find in the discovery world Oct 18, 2026

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Discovered and summarized by LinkLens. We credit and link to the original creators; summaries are not independent fact-checks. Connections appear only when supported by our published discovery records.