Assignee
TONE BORING CO
JP·4 granted patents·97 citations·filing 1974–1986
Top patents by PatentIndex Score
4 records- 0170US4790391AAir pressure impact drilling method and apparatus for sameTONE BORING CO·Filed 1986·Granted Dec 13, 1988·48 cites·9 claims
- 0250US4718504ATrench excavatorTONE BORING CO·Filed 1986·Granted Jan 12, 1988·25 cites·6 claims
- 0344US3945445ABoring apparatus provided with drill bits freely rotatable around their own axisTONE BORING CO·Filed 1974·Granted Mar 23, 1976·12 cites·14 claims
- 0440US4760888ADrill bit for core boringTONE BORING CO·Filed 1986·Granted Aug 2, 1988·12 cites·10 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →