Inventor · disambiguated record
Norman William Liefke
Also filed as: LIEFKE NORMAN WILLIAM
7 granted patents·94 citations·filing 2006–2017
84Inventor score
Top patents by PatentIndex Score
7 records- 0189US7503550B2Enclosed fence/railing setLIEFKE NORMAN WILLIAM·Filed 2007·Granted Mar 17, 2009·34 cites·6 claims
- 0288US10184267B2Supporting mechanism for glass fenceKUO CHINGYAO·Filed 2016·Granted Jan 22, 2019·12 cites·8 claims
- 0383US7316293B2Extension ladder with improved mechanismYAO KUO-CHING·Filed 2006·Granted Jan 8, 2008·25 cites·13 claims
- 0477US9732528B1Accessible passageway assemblyKUO CHINGYAO·Filed 2016·Granted Aug 15, 2017·8 cites·8 claims
- 0570US8869939B2Extension ladderKUO CHING YAO·Filed 2008·Granted Oct 28, 2014·11 cites·15 claims
- 0668US9822521B1Assembly outdoor balconyKUO CHINGYAO·Filed 2016·Granted Nov 21, 2017·4 cites·7 claims
- 0737US10415255B2Handrail and railing assemblyKUO CHINGYAO·Filed 2017·Granted Sep 17, 2019·0 cites·4 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →