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US Patent: 5,880X
Quadrant
Quadrant and sextant
Patentee:
Phineas Spear (exact or similar names) - Portland, Cumberland County, ME

USPTO Classifications:

Tool Categories:
trade specific : surveyor

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Granted: Mar. 19, 1830

Patent Pictures:
USPTO (New site tip)
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Report data errors or omissions to steward Joel Havens
Description:
Listed in A List of Patents Issued by the United States, from 1790 to 1847, 1847, pgs. 186 & 563.

Most of the patents prior to 1836 were lost in the Dec. 1836 fire. Only about 2,000 of the almost 10,000 documents were recovered. Little is known about this patent. There are no patent drawings available. This patent is in the database for reference only.

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