CA786531A - Light ray educational apparatus - Google Patents

Light ray educational apparatus

Info

Publication number
CA786531A
CA786531A CA786531A CA786531DA CA786531A CA 786531 A CA786531 A CA 786531A CA 786531 A CA786531 A CA 786531A CA 786531D A CA786531D A CA 786531DA CA 786531 A CA786531 A CA 786531A
Authority
CA
Canada
Prior art keywords
light ray
educational apparatus
educational
ray
light
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
CA786531A
Inventor
E. Rive Charles
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Publication date
Application granted granted Critical
Publication of CA786531A publication Critical patent/CA786531A/en
Expired legal-status Critical Current

Links

CA786531A Light ray educational apparatus Expired CA786531A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA786531T

Publications (1)

Publication Number Publication Date
CA786531A true CA786531A (en) 1968-06-04

Family

ID=36249185

Family Applications (1)

Application Number Title Priority Date Filing Date
CA786531A Expired CA786531A (en) Light ray educational apparatus

Country Status (1)

Country Link
CA (1) CA786531A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5108293A (en) * 1990-09-14 1992-04-28 Edmund Scientific Company Method and apparatus for displaying a beam of light

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5108293A (en) * 1990-09-14 1992-04-28 Edmund Scientific Company Method and apparatus for displaying a beam of light

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