NL149018B - Projectiestelsel voor leerdoeleinden. - Google Patents

Projectiestelsel voor leerdoeleinden.

Info

Publication number
NL149018B
NL149018B NL707014841A NL7014841A NL149018B NL 149018 B NL149018 B NL 149018B NL 707014841 A NL707014841 A NL 707014841A NL 7014841 A NL7014841 A NL 7014841A NL 149018 B NL149018 B NL 149018B
Authority
NL
Netherlands
Prior art keywords
projection scheme
learning purposes
learning
purposes
projection
Prior art date
Application number
NL707014841A
Other languages
English (en)
Other versions
NL7014841A (nl
Original Assignee
Matsushita Electric Ind Co Ltd
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 Matsushita Electric Ind Co Ltd filed Critical Matsushita Electric Ind Co Ltd
Publication of NL7014841A publication Critical patent/NL7014841A/xx
Publication of NL149018B publication Critical patent/NL149018B/nl

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
    • G09B7/00—Electrically-operated teaching apparatus or devices working with questions and answers
    • G09B7/06—Electrically-operated teaching apparatus or devices working with questions and answers of the multiple-choice answer-type, i.e. where a given question is provided with a series of answers and a choice has to be made from the answers

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Physics & Mathematics (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • General Physics & Mathematics (AREA)
  • Electrically Operated Instructional Devices (AREA)
  • Projection Apparatus (AREA)
  • Overhead Projectors And Projection Screens (AREA)
NL707014841A 1969-10-11 1970-10-09 Projectiestelsel voor leerdoeleinden. NL149018B (nl)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP44081421A JPS4814691B1 (nl) 1969-10-11 1969-10-11

Publications (2)

Publication Number Publication Date
NL7014841A NL7014841A (nl) 1971-04-14
NL149018B true NL149018B (nl) 1976-03-15

Family

ID=13745876

Family Applications (1)

Application Number Title Priority Date Filing Date
NL707014841A NL149018B (nl) 1969-10-11 1970-10-09 Projectiestelsel voor leerdoeleinden.

Country Status (6)

Country Link
US (1) US3701204A (nl)
JP (1) JPS4814691B1 (nl)
CA (1) CA934150A (nl)
DE (1) DE2049713C3 (nl)
GB (1) GB1322059A (nl)
NL (1) NL149018B (nl)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US23030A (en) * 1859-02-22 Improvement in steam-boilers
US2783454A (en) * 1955-01-12 1957-02-26 Donald O North Data assembly apparatus

Also Published As

Publication number Publication date
JPS4814691B1 (nl) 1973-05-09
DE2049713A1 (de) 1971-05-13
US3701204A (en) 1972-10-31
NL7014841A (nl) 1971-04-14
CA934150A (en) 1973-09-25
DE2049713C3 (de) 1974-09-26
DE2049713B2 (de) 1974-02-28
GB1322059A (en) 1973-07-04

Similar Documents

Publication Publication Date Title
DK126959B (da) Muffe.
DK130661B (da) Forbrændingsapparat.
NL144743B (nl) Elektrostatisch kopieerapparaat.
NL153350B (nl) Onderwijsinrichting.
NO136743C (no) Glideb}t.
DK136274B (da) Universalled.
DK137867B (da) Stenbor.
NL149293B (nl) Projectiestelsel.
NL155662B (nl) Projectorstelsel.
NL144741B (nl) Werkwijze voor kleuren-elektrofotografie.
BE787435A (fr) Beschermingsneus voor veiligheidsschoeisel.
NL149018B (nl) Projectiestelsel voor leerdoeleinden.
DK125006B (da) Termokopieringsapparat.
ES161750Y (es) Proyector cinematografico.
DK128800C (da) Fremkalderapparat.
NL141269B (nl) Vlechtwerk voor lichtafschermingen.
DK126547B (da) Nematodicid.
NL154021B (nl) Werkwijze voor elektrografisch reproduceren.
ES183773Y (es) Caja-mueble proyectora.
BE786048A (fr) Geprefabrikeerde veiligheidsbordstenen voor rijwegen.
BE778546A (fr) Houder voor tramkaart en dergelijke.
FI52546C (fi) Leijualus.
DK124185B (da) Termokopieringsmaskine.
ES153854Y (es) Colchoneta-capazo infantil.
ES151924Y (es) Bucaro simulado.

Legal Events

Date Code Title Description
V1 Lapsed because of non-payment of the annual fee
NL80 Abbreviated name of patent owner mentioned of already nullified patent

Owner name: MATSUSHITA