Classifications

• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
  • G01B3/00—Measuring instruments characterised by the use of mechanical techniques
  • G01B3/02—Rulers with scales or marks for direct reading
  • G01B3/04—Rulers with scales or marks for direct reading rigid
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
  • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
  • B43L7/00—Straightedges

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Length-Measuring Instruments Using Mechanical Means (AREA)
• Drawing Aids And Blackboards (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=20419620

Family Applications (1)

Country Status (3)

Family Cites Families (1)

• 0
  • BE BE519393D patent/BE519393A/xx unknown
• 1953
  • 1953-04-10 FR FR1074440D patent/FR1074440A/fr not_active Expired
  • 1953-04-24 DE DEB25303A patent/DE949394C/de not_active Expired

Also Published As

Similar Documents