Inventor · disambiguated record
David Shaffer
Also filed as: SHAFFER DAVID · SHAFFER DAVID R
5 granted patents·33 citations·filing 1994–2015
77Inventor score
Top patents by PatentIndex Score
5 records- 0163US9392874B2Pressure reducing deviceSHAFFER DAVID·Filed 2015·Granted Jul 19, 2016·2 cites·19 claims
- 0255US5766906AHepatitis A virus deletion mutants and vaccine formulations containing the sameUNIV NORTH CAROLINA·Filed 1994·Granted Jun 16, 1998·18 cites·10 claims
- 0351US8778036B2Upgrading carbonaceous materialsSHAFFER DAVID R·Filed 2011·Granted Jul 15, 2014·0 cites·47 claims
- 0444USD777935SPressure reducing deviceSHAFFER DAVID·Filed 2015·Granted Jan 31, 2017·5 cites·1 claims
- 0543US6136322AHepatitis A virus deletion mutants and vaccine formulations containing the sameUNIV NORTH CAROLINA·Filed 1998·Granted Oct 24, 2000·8 cites·9 claims
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