ZA71300B - Drawing instrument - Google Patents

Drawing instrument

Info

Publication number
ZA71300B
ZA71300B ZA710300A ZA71300A ZA71300B ZA 71300 B ZA71300 B ZA 71300B ZA 710300 A ZA710300 A ZA 710300A ZA 71300 A ZA71300 A ZA 71300A ZA 71300 B ZA71300 B ZA 71300B
Authority
ZA
South Africa
Prior art keywords
drawing instrument
instrument
Prior art date
Application number
ZA710300A
Inventor
V Holtrop
Original Assignee
V Holtrop
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 V Holtrop filed Critical V Holtrop
Priority to ZA710300A priority Critical patent/ZA71300B/en
Priority to DE19722201978 priority patent/DE2201978A1/en
Publication of ZA71300B publication Critical patent/ZA71300B/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L13/00—Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
    • B43L13/14—Devices for drawing in perspective
    • B43L13/141—Two-dimensional devices
    • B43L13/145—Rulers
ZA710300A 1971-01-18 1971-01-18 Drawing instrument ZA71300B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ZA710300A ZA71300B (en) 1971-01-18 1971-01-18 Drawing instrument
DE19722201978 DE2201978A1 (en) 1971-01-18 1972-01-17 Drawing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA710300A ZA71300B (en) 1971-01-18 1971-01-18 Drawing instrument

Publications (1)

Publication Number Publication Date
ZA71300B true ZA71300B (en) 1972-04-26

Family

ID=25562939

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA710300A ZA71300B (en) 1971-01-18 1971-01-18 Drawing instrument

Country Status (2)

Country Link
DE (1) DE2201978A1 (en)
ZA (1) ZA71300B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2575420B1 (en) * 1985-01-03 1989-08-04 Derrien Bernard DEVICE FOR TRACKING CIRCLE CIRCLES AND THEIR RADIUS CONVERGING TOWARDS A VIRTUAL CENTER

Also Published As

Publication number Publication date
DE2201978A1 (en) 1972-09-21

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