KR890014327U - Math lesson - Google Patents

Math lesson

Info

Publication number
KR890014327U
KR890014327U KR2019870023437U KR870023437U KR890014327U KR 890014327 U KR890014327 U KR 890014327U KR 2019870023437 U KR2019870023437 U KR 2019870023437U KR 870023437 U KR870023437 U KR 870023437U KR 890014327 U KR890014327 U KR 890014327U
Authority
KR
South Korea
Prior art keywords
lesson
math
math lesson
Prior art date
Application number
KR2019870023437U
Other languages
Korean (ko)
Other versions
KR900010818Y1 (en
Inventor
서남헌
Original Assignee
서남헌
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 by 서남헌 filed Critical 서남헌
Priority to KR2019870023437U priority Critical patent/KR900010818Y1/en
Publication of KR890014327U publication Critical patent/KR890014327U/en
Application granted granted Critical
Publication of KR900010818Y1 publication Critical patent/KR900010818Y1/en

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)
KR2019870023437U 1987-12-29 1987-12-29 Teaching equipment of mathematics KR900010818Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019870023437U KR900010818Y1 (en) 1987-12-29 1987-12-29 Teaching equipment of mathematics

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019870023437U KR900010818Y1 (en) 1987-12-29 1987-12-29 Teaching equipment of mathematics

Publications (2)

Publication Number Publication Date
KR890014327U true KR890014327U (en) 1989-08-10
KR900010818Y1 KR900010818Y1 (en) 1990-11-30

Family

ID=19270894

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019870023437U KR900010818Y1 (en) 1987-12-29 1987-12-29 Teaching equipment of mathematics

Country Status (1)

Country Link
KR (1) KR900010818Y1 (en)

Also Published As

Publication number Publication date
KR900010818Y1 (en) 1990-11-30

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Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
REGI Registration of establishment
FPAY Annual fee payment

Payment date: 19941118

Year of fee payment: 5

LAPS Lapse due to unpaid annual fee