CH61950A
(en )
1913-11-01
Teaching aids for music lessons
CH73304A
(en )
1916-09-16
Ruling and calculating apparatus for teaching purposes
CH53455A
(en )
1912-02-16
Calculating device for school lessons
AT75650B
(en )
1919-02-25
Arithmetic teaching aids.
CH69648A
(en )
1915-07-16
Illustrative apparatus for teaching elementary arithmetic
CH58017A
(en )
1913-02-17
Arithmetic teaching aids with movable bodies
FR443504A
(en )
1912-09-26
Physiological and educational school table
CH59854A
(en )
1913-06-16
School bench
CH59917A
(en )
1913-06-16
Apparatus for teaching the beginnings of arithmetic
GB191323225A
(en )
1914-05-21
An Apparatus for use in the Teaching of Music.
CH78533A
(en )
1918-08-16
Adjustable mannequin
CH46423A
(en )
1910-03-01
School blackboard
CA172961A
(en )
1916-11-07
Educational device
FR449696A
(en )
1913-03-05
Further training in centrifuges
FR459726A
(en )
1913-11-12
Airplane training
FR16115E
(en )
1912-11-20
Further training in phaetons landaulets and similar bodies
FR428775A
(en )
1911-09-07
Trainings improvements
ES63888A1
(en )
1917-03-16
Improvements in the so-called classroom and teaching cinematographers.
CA140582A
(en )
1912-05-21
Educational device
FR425711A
(en )
1911-06-19
Reminder indicator
FR485530A
(en )
1918-01-16
Improvements to advertising and other devices
FR485924A
(en )
1918-02-20
Improvements to sirens and other similar devices
ES51133A1
(en )
1911-12-01
A new means of school education.
FR473281A
(en )
1915-01-07
Mannequin transformer
FR525850A
(en )
1921-09-28
Improvements to tie-pin clips and tie-clips