USD165220S - Fertility slide rule - Google Patents
Fertility slide rule Download PDFInfo
- Publication number
- USD165220S USD165220S US D165220 S USD165220 S US D165220S
- Authority
- US
- United States
- Prior art keywords
- fertility
- slide rule
- slide
- rule
- deschamps
- Prior art date
Links
- 230000035558 fertility Effects 0.000 title description 6
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Description
NOV. 20, 195 p DESCHAMPS Des. 165,220
FERTILITY SLIDE RULE Filed Oct. 14, 1950 p/kzuoga.
Patented Nov. 20, 1951 Des. 165,220
UNITED STATES PATENT OFFICE FERTILITY SLIDE RULE Elie Paul Emile Deschamps, Oyonnax, France Application October 14, 1950, Serial No. 12,577 In France August 25, 1950 Term of patent 7 years (Cl. D52-1) REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name a Date 1,802,603 Herm Apr. 28, 1931 2,517,793 Lancaster Aug. 8, 1950 2,520,208 Green Aug. 29, 1950
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