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US Patent: 198,909
Improvement in Spirit Levels
Patentees:
Frederick T. Ward - Mohawk, NY
Thomas Bedworth - Mohawk, NY

USPTO Classifications:
33/379

Tool Categories:
layout tools : levels
trade specific : stonemason
trade specific : bricklayer

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
William Helmer
Charles A. Paul

Patent Dates:
Applied: Jun. 23, 1877
Granted: Jan. 01, 1878

Patent Pictures:
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Description:
Mason's level with ribs on the leveling surface to allow the level to be placed on stone/bricks and mortar, where the crumbs of mortar will be pushed in between the ribs.

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