US Patent: 1,991,854
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| Apparatus for demonstrating the adhesion of flat surfaces
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Patentee:
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| Carl Edvard Johansson (exact or similar names) - Detroit, MI |
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Patent Dates:
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| Applied: |
Apr. 13, 1933 |
| Granted: |
Feb. 19, 1935 |
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Joel Havens
"Vintage Machinery" entry for C. E. Johansson, Inc.
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Description: |
| "This invention relates to improvements in apparatus for demonstrating the adhesion of flat surfaces, such as the accurately finished surfaces of 'Johansson gauges'." Johansson gauge blocks, or Jo blocks, were not patented in the US as they were patented long before Johansson moved from Sweden to Detroit. |
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