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
Inventor
Horatio Sheaf
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 GB189905579ApublicationCriticalpatent/GB189905579A/en
5 5 7 9 . Sheaf, H. March 14. Educational appliances; blackboards.-Relates to apparatus for use in place of blackboards &c. Fig. 2 shows a section. A length of paper, linen, or other suitable material g is carried on the rollers f, f<1>, and passes in front of the board a. The ends of the rollers f, f<1> may be secured in slots by suitable pivoted catches, or may be slightly recessed and supported endwise on screw spindles.
GB189905579D1899-03-141899-03-14A New or Improved Educational Apparatus.
ExpiredGB189905579A
(en)