CH545521A - - Google Patents

Info

Publication number
CH545521A
CH545521A CH653272A CH545521DA CH545521A CH 545521 A CH545521 A CH 545521A CH 653272 A CH653272 A CH 653272A CH 545521D A CH545521D A CH 545521DA CH 545521 A CH545521 A CH 545521A
Authority
CH
Switzerland
Application number
CH653272A
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Publication of CH545521A publication Critical patent/CH545521A/xx

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
    • G09B23/02—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for mathematics
    • G09B23/04—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for mathematics for geometry, trigonometry, projection or perspective

Landscapes

  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Computational Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Geometry (AREA)
  • Business, Economics & Management (AREA)
  • Algebra (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • Theoretical Computer Science (AREA)
  • Toys (AREA)
CH653272A 1971-05-03 1972-05-02 CH545521A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE7116996 1971-05-03
DE7127928 1971-06-21

Publications (1)

Publication Number Publication Date
CH545521A true CH545521A (en) 1974-01-31

Family

ID=25946765

Family Applications (1)

Application Number Title Priority Date Filing Date
CH653272A CH545521A (en) 1971-05-03 1972-05-02

Country Status (3)

Country Link
US (1) US3786568A (en)
CH (1) CH545521A (en)
FR (1) FR2135611B1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4408848A (en) * 1977-10-21 1983-10-11 Gast Fred C Apparatus for indicating a line and for producing and visually displaying an image of a line indicator
US4449304A (en) * 1983-01-24 1984-05-22 Binney & Smith Inc. Drawing instrument and locking apparatus therefor
US4798537A (en) * 1988-02-29 1989-01-17 Ragouzis Perry N Movable grid drawing frame
US6845565B2 (en) * 2001-12-20 2005-01-25 Jeanmarie Hajla Monitor device
US9440482B2 (en) * 2013-07-11 2016-09-13 David Cunningham Adjustable grid drawing frame

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US633263A (en) * 1898-02-11 1899-09-19 Daniel Grant Surveyor's instrument.
US1072908A (en) * 1912-09-05 1913-09-09 Pasquale Buda Method and apparatus for making patterns.
DE418959C (en) * 1923-11-15 1925-09-17 Heinrich Koenemann Dr Seal for electrically insulated entries in vacuum vessels
CH145175A (en) * 1929-10-19 1931-02-15 Guyer Jean Instrument for sighting drawing objects, as well as for geometric purposes and for determining the geographical direction based on a map.
US2507460A (en) * 1946-10-03 1950-05-09 W M Welch Mfg Company Visual aid for mathematics
US2446253A (en) * 1947-04-11 1948-08-03 Tresidder Herbert Eva Line holder
US2529413A (en) * 1948-04-13 1950-11-07 Benton C Petersen Artjopat designing board
US2585160A (en) * 1949-04-29 1952-02-12 John R Munn Bricklayer's guide
DE1102610B (en) * 1957-03-29 1961-03-16 Stefan H Hedrich Plan board for marking earth targets and detonation points of localization shots in a coordinate plan

Also Published As

Publication number Publication date
FR2135611A1 (en) 1972-12-22
US3786568A (en) 1974-01-22
FR2135611B1 (en) 1973-07-13

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Legal Events

Date Code Title Description
PL Patent ceased