CH73113A
(en )
1916-08-16
Teaching aids for school and object lessons
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
CH69648A
(en )
1915-07-16
Illustrative apparatus for teaching elementary arithmetic
CH58017A
(en )
1913-02-17
Arithmetic teaching aids with movable bodies
FR463525A
(en )
1914-02-25
Mannequin
FR443504A
(en )
1912-09-26
Physiological and educational school table
CH54866A
(en )
1912-07-01
Ellipses and circles
CH60799A
(en )
1913-08-16
Teaching aids for fractions
FR17469E
(en )
1913-09-20
Further training in phaeton landaulets and similar bodies
CH59854A
(en )
1913-06-16
School bench
CH59917A
(en )
1913-06-16
Apparatus for teaching the beginnings of arithmetic
FR488125A
(en )
1918-09-05
Improvements in differential mechanisms
GB191323225A
(en )
1914-05-21
An Apparatus for use in the Teaching of Music.
CH78533A
(en )
1918-08-16
Adjustable mannequin
CH59369A
(en )
1913-05-02
school board
FR436884A
(en )
1912-04-06
Further training in phaeton-landaulets and similar bodies
FR440789A
(en )
1912-07-20
Removable kite
FR428775A
(en )
1911-09-07
Trainings improvements
CH70609A
(en )
1915-10-01
Welding sheet and method of making the same
FI4340A
(en )
1911-03-23
Anordningar vid acoustic instrument
ES63888A1
(en )
1917-03-16
Improvements in the so-called classroom and teaching cinematographers.
FR505384A
(en )
1920-07-29
School bench
CA140582A
(en )
1912-05-21
Educational device