Electric hammer
United States Patent 3280921
US Patent References:
/1162889.html
- - 1162889
Hammer attachment for electric drills and the like
- - 1665173
Combined rotary and reciprocatory drill
- - 1889441
Hammer tool
- - 2501542
/1162889.html
- - 1162889
Hammer attachment for electric drills and the like
- - 1665173
Combined rotary and reciprocatory drill
- - 1889441
Hammer tool
- - 2501542
Inventors:
Bickford, Franklin H.
Publication Date:
10/25/1966
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Assignee:
Bickford, Franklin H.
Primary Class:
Other Classes:
227/131
International Classes:
B25C1/06; B25C1/00