with changeable leg-ends for conversion into compasses, dividers, or callipers

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Industry

CPC
B43L9/14

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Parent Industries

BPERFORMING OPERATIONS TRANSPORTING B43Writing accessories B43LARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING B43L9/00Circular curve-drawing or like instruments

Current Industry

B43L9/14with changeable leg-ends for conversion into compasses, dividers, or callipers

Industries

Patents Grantslast 30 patents

Information Patent Grant
2663936
- Patent number 2,663,936
- Issue date Dec 29, 1953
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
Information Patent Grant
1465746
- Patent number 1,465,746
- Issue date Aug 21, 1923
- B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES