Holder for etching electrodes
United States Patent 2422265

Inventors:
Squires, Frederic B.
Publication Date:
06/17/1947
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Assignee:
Squires, Frederic B.
Primary Class:
219/138
Other Classes:
439/843, 219/136, 219/70, 191/1R, 439/851, 174/21JS, 219/234
International Classes:
C25F7/00
US Patent References:
1869328Welding torch
2215108Electric heating system
Foreign References:
FR490199A