KR850003483U - Textbook Record Timer - Google Patents

Textbook Record Timer

Info

Publication number
KR850003483U
KR850003483U KR2019830009023U KR830009023U KR850003483U KR 850003483 U KR850003483 U KR 850003483U KR 2019830009023 U KR2019830009023 U KR 2019830009023U KR 830009023 U KR830009023 U KR 830009023U KR 850003483 U KR850003483 U KR 850003483U
Authority
KR
South Korea
Prior art keywords
textbook
record timer
timer
record
textbook record
Prior art date
Application number
KR2019830009023U
Other languages
Korean (ko)
Other versions
KR850001421Y1 (en
Inventor
정추규
Original Assignee
정추규
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 정추규 filed Critical 정추규
Priority to KR2019830009023U priority Critical patent/KR850001421Y1/en
Publication of KR850003483U publication Critical patent/KR850003483U/en
Application granted granted Critical
Publication of KR850001421Y1 publication Critical patent/KR850001421Y1/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
    • G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
    • G09B23/08—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics
    • 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
    • G09B19/00—Teaching not covered by other main groups of this subclass
    • G09B19/02—Counting; Calculating
    • G09B19/025—Counting; Calculating with electrically operated apparatus or devices
    • 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
    • G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
    • G09B23/08—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics
    • G09B23/12—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics of liquids or gases

Landscapes

  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Educational Technology (AREA)
  • Educational Administration (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Physics (AREA)
  • Pure & Applied Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Algebra (AREA)
  • Computational Mathematics (AREA)
  • Entrepreneurship & Innovation (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)
KR2019830009023U 1983-10-22 1983-10-22 A record-timer for education KR850001421Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019830009023U KR850001421Y1 (en) 1983-10-22 1983-10-22 A record-timer for education

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019830009023U KR850001421Y1 (en) 1983-10-22 1983-10-22 A record-timer for education

Publications (2)

Publication Number Publication Date
KR850003483U true KR850003483U (en) 1985-06-17
KR850001421Y1 KR850001421Y1 (en) 1985-07-08

Family

ID=70159287

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019830009023U KR850001421Y1 (en) 1983-10-22 1983-10-22 A record-timer for education

Country Status (1)

Country Link
KR (1) KR850001421Y1 (en)

Also Published As

Publication number Publication date
KR850001421Y1 (en) 1985-07-08

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Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
NORF Unpaid initial registration fee