Inventor · disambiguated record
Duncan Johnstone
Also filed as: JOHNSTONE DUNCAN
5 granted patents·207 citations·filing 1975–2002
83Inventor score
Top patents by PatentIndex Score
5 records- 0192US4017281AIndustrial vacuum loader with dust removal means for bag house filtration systemJOHNSTONE DUNCAN·Filed 1975·Granted Apr 12, 1977·129 cites·6 claims
- 0280US4735639AModular industrial vacuum loading apparatus for ingesting and collecting debris and filtering discharged airVACUUM AMERICA CORP·Filed 1986·Granted Apr 5, 1988·56 cites·21 claims
- 0365US6726846B2Vertical membrane storage system and method of storing liquids using the sameFiled 2002·Granted Apr 27, 2004·7 cites·17 claims
- 0464US6436289B1Vertical membrane storage system and method of storing liquids using the sameFiled 2000·Granted Aug 20, 2002·7 cites·19 claims
- 0546US6672048B2Rotary impeller driven turbineFiled 2002·Granted Jan 6, 2004·8 cites·10 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →