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Patent:GB190325518

Patent:	GB 190325518
Title:	Apparatus Combining a Blackboard with Means for Teaching Calculating and Reading
Date:	22.09.1904
Place:
Country:	Great Britain
Person:	Gess, Gustav (P)
Company:
Internal Links:	Lehrmittel
Keywords:
Link to the patent office: (without guarantee)	GB190325518

Aus der Patentschrift GB190325518

• DATUM: 22.09.1904
• TITEL: Apparatus Combining a Blackboard with Means for Teaching Calculating and Reading.
• PERSON: GESS GUSTAV DE