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.)
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
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 IndividualfiledCriticalIndividual
Application grantedgrantedCritical
Publication of FR349787ApublicationCriticalpatent/FR349787A/fr
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
B43L13/16—Devices for drawing in perspective free-hand
FR349787D1904-12-311904-12-31Instrument destiné à l'appréciation des angles et des longueurs dans les déformations de perspective
ExpiredFR349787A
(fr)