TIN MULTIPLICATION CALCULATOR
- Inventor
- Unkown
- Invention date
- Unkown
- Manufacturing date
- November 1, 1898
- Manufacturing location
- USA
- Manufacturer
- Unknown
- Dimensions
- L 22 D 4
- Reference Number
- 121
History and Functionality
The upper part has Victorian scenery on it.
There is a pupil writing on the black board. The bottom part gives the result of the questions.
Patent was filed on Nov 1, 1898.
This device gives you the products of the nine first integers.
