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US Patent: 2,155,890
Heating System
Patentee:
Richard L. Campbell (exact or similar names) - Birmingham, Oakland County, MI

USPTO Classifications:
236/9A, 237/8R

Tool Categories:
specialty machines : heating apparatus

Assignees:
Detroit Lubricator Co. - Detroit, Wayne County, MI

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Jan. 15, 1936
Granted: Apr. 25, 1939

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Joel Havens
"Vintage Machinery" entry for Detroit Lubricator Co.

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