PRESBY DAVID W has a total of 16 patent applications. Its first patent ever was published in 1996. It filed its patents most often in Canada, United States and WIPO (World Intellectual Property Organization). Its main competitors in its focus markets environmental technology, chemical engineering and mechanical elements are EM & C KOREA CO LTD, SHIN MYEONG CONSTRUCTION ENG CO LTD and OCEANSAVER AS.
# | Country | Total Patents | |
---|---|---|---|
#1 | Canada | 9 | |
#2 | United States | 5 | |
#3 | WIPO (World Intellectual Property Organization) | 2 |
# | Industry | |
---|---|---|
#1 | Environmental technology | |
#2 | Chemical engineering | |
#3 | Mechanical elements | |
#4 | Civil engineering | |
#5 | Machines | |
#6 | Machine tools |
# | Technology | |
---|---|---|
#1 | Water treatment | |
#2 | Separation | |
#3 | Pipes | |
#4 | Hydraulic engineering | |
#5 | Sewers | |
#6 | Unspecified technologies | |
#7 | Unspecified technologies | |
#8 | Separating solids | |
#9 | Perforating | |
#10 | Separating solids using liquids |
# | Name | Total Patents |
---|---|---|
#1 | Presby David W | 15 |
#2 | Presby David | 1 |
Publication | Filing date | Title |
---|---|---|
US7288190B2 | Method, apparatus and system for removal of contaminants from water | |
US7270532B2 | Skimmer tab former | |
CA2415194A1 | Method, apparatus and actuatable perforator for creating apertures in pipe and pipe produced thereby | |
CA2365453A1 | An end cap for a corrugated conduit | |
CA2359255A1 | Means for coupling conduit | |
CA2300535A1 | Plastic sewage pipe | |
CA2286995A1 | Multi-level leaching system | |
CA2187126A1 | Apparatus and method for producing pipe and pipe produced thereby | |
CA2185087A1 | Using multi-layer material in processing of septic effluent and waste water |