DE Patent: DE-139,423
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| Schraubenschlüssel
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Patentee:
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| Robert Giersdorff (exact or similar names) - Posen, Germany |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Granted: |
Mar. 12, 1903 |
| Antedated: |
Jul. 13, 1902 |
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Patent Pictures:
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German patent 139423 - composite edited image |
Espacenet patent
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Stan Schulz
German patent 139423 in ESPACENET
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Description: |
| The function of the web is to keep the jaws from spreading under the strain of hard to turn nuts or bolts.
German patent Klasse 87 (a) Gruppe 6. |
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