US Patent: 914,244 - Method of Making Interchangeable Ground Glass Bottle Necks and Ground Glass Stoppers Therefore


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US Patent: 914,244

Method of Making Interchangeable Ground Glass Bottle Necks and Ground Glass Stoppers Therefore

Patentee:

Conrad M. Conradson (exact or similar names) - Madison, Dane County, WI

USPTO Classifications:

Tool Categories:

Assignees:

Precision Glass Grinding Machine Co. - Sioux Falls, Minnehaha County, SD

Manufacturer:

Not known to have been produced

Witnesses:

Unknown

Patent Pictures: