KR890019817U - 수학 교습구 - Google Patents

수학 교습구

Info

Publication number
KR890019817U
KR890019817U KR2019880003713U KR880003713U KR890019817U KR 890019817 U KR890019817 U KR 890019817U KR 2019880003713 U KR2019880003713 U KR 2019880003713U KR 880003713 U KR880003713 U KR 880003713U KR 890019817 U KR890019817 U KR 890019817U
Authority
KR
South Korea
Prior art keywords
lesson
math
math lesson
Prior art date
Application number
KR2019880003713U
Other languages
English (en)
Other versions
KR900010821Y1 (ko
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 KR2019880003713U priority Critical patent/KR900010821Y1/ko
Publication of KR890019817U publication Critical patent/KR890019817U/ko
Application granted granted Critical
Publication of KR900010821Y1 publication Critical patent/KR900010821Y1/ko

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

Landscapes

  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Pure & Applied Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Physics (AREA)
  • Computational Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Algebra (AREA)
  • Business, Economics & Management (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • Theoretical Computer Science (AREA)
  • Toys (AREA)
KR2019880003713U 1988-03-21 1988-03-21 수학 교습구 KR900010821Y1 (ko)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019880003713U KR900010821Y1 (ko) 1988-03-21 1988-03-21 수학 교습구

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019880003713U KR900010821Y1 (ko) 1988-03-21 1988-03-21 수학 교습구

Publications (2)

Publication Number Publication Date
KR890019817U true KR890019817U (ko) 1989-10-05
KR900010821Y1 KR900010821Y1 (ko) 1990-11-30

Family

ID=19273379

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019880003713U KR900010821Y1 (ko) 1988-03-21 1988-03-21 수학 교습구

Country Status (1)

Country Link
KR (1) KR900010821Y1 (ko)

Also Published As

Publication number Publication date
KR900010821Y1 (ko) 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