Inventor · disambiguated record
Matthew Floyd Shofner
Also filed as: SHOFNER MATTHEW · SHOFNER MATTHEW F · SHOFNER MATTHEW FLOYD
5 granted patents·1 pending application·105 citations·filing 1993–2024
79Inventor score
Technology areasE21B
Top patents by PatentIndex Score
6 records- 0167US6454026B1Percussive down-the-hole hammer for rock drilling, a top sub used therein and a method for adjusting air pressureSANDVIK AB·Filed 2000·Granted Sep 24, 2002·39 cites·15 claims
- 0266US5407021ADown-the-hole hammer drill having reverse circulationSANDVIK ROCK TOOLS AB·Filed 1993·Granted Apr 18, 1995·48 cites·22 claims
- 0351US6499544B1Percussive down-the-hole hammer for rock drilling, and a one-way valve used thereinSANDVIK AB·Filed 2000·Granted Dec 31, 2002·17 cites·10 claims
- 0444US7353890B2Down-the-hole hammer and components for a down-the-hole hammer, and a method of assembling a down-the-hole hammerSANDVIK INTELLECTUAL PROPERTY·Filed 2006·Granted Apr 8, 2008·1 cites·28 claims
- 0544US2024418046A1Center tube retentionTERELION LLC·Filed 2024·Application pending·0 cites
- 0637US7434635B2Tin seat for rock drill insertSANDVIK INTELLECTUAL PROPERTY·Filed 2006·Granted Oct 14, 2008·0 cites·18 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →