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term: person:
2025.7.122
Precision Sterling Slide Rule

2025.7.35
"Sun Hemmi's Bamboo Slide Rule" Patent.No 58115

2025.7.52
Hughes-Owens Sun Hemmi Slide Rule

2025.7.53
Aristo Nr. 89 Slide Rule

2025.7.54
UTO No. 601 U Slide Rule

2025.7.55
Model 1768 The Hughes Owens Co. Limited Slide Rule

2025.7.56
Sterling Decimal Trig Multi-Log Slide Rule

2025.7.57
'Unique' Universal II Slide Rule

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Dorian Hausman (8)
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