- ReferenceGKL10/3/9/2
- TitleUnited States Patent Office. Frank Walker of Tombstone, Arizona Territory, assignor to the Keystone Water Meter Manufacturing Company, (Limited) of Philadelphia, Pennsylvania. Water meter specification forming part of Letters Patent No. 302,179.
- Date free text15 Jul 1884
- Production dateFrom: 1884 To: 1884
- Level of descriptionitem
- Persons/institution keyword
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