LETRO PRODUCTS INC has a total of 25 patent applications. Its first patent ever was published in 1995. It filed its patents most often in United States, EPO (European Patent Office) and Australia. Its main competitors in its focus markets civil engineering, machines and transport are GO PAPA LLLP, BAEJIN CORP and STEELDECK IND LTD.
# | Country | Total Patents | |
---|---|---|---|
#1 | United States | 11 | |
#2 | EPO (European Patent Office) | 5 | |
#3 | Australia | 4 | |
#4 | South Africa | 3 | |
#5 | WIPO (World Intellectual Property Organization) | 2 |
# | Industry | |
---|---|---|
#1 | Civil engineering | |
#2 | Machines | |
#3 | Transport | |
#4 | Chemical engineering | |
#5 | Agriculture |
# | Technology | |
---|---|---|
#1 | Swimming pools | |
#2 | Unspecified technologies | |
#3 | Animal care | |
#4 | Vehicle tyre repairing | |
#5 | Vehicle wheels | |
#6 | Water-closets with flushing devices | |
#7 | Separation |
# | Name | Total Patents |
---|---|---|
#1 | Campbell Sanford F | 24 |
#2 | Gopalan Suresh Cherulassery | 9 |
#3 | Jones Robert E | 8 |
#4 | Martin Bret | 3 |
#5 | Caris Daniel D | 2 |
#6 | Ellis James P | 1 |
#7 | Campbell Sanford | 1 |
Publication | Filing date | Title |
---|---|---|
WO0238238A2 | Suction pool cleaner with noise damping valve | |
US6357478B1 | Suction flow regulator | |
US6379542B1 | Pool cleaner with righting weight assembly | |
US6423217B1 | Pool cleaner having vortex drive tube | |
US6193885B1 | Pool cleaner debris bag | |
US6158464A | Low pressure back-up valve for pool cleaner | |
US5933899A | Low pressure automatic swimming pool cleaner | |
US6099091A | Traction enhanced wheel apparatus | |
US6035879A | Automatic fill valve assembly | |
US5893188A | Automatic swimming pool cleaner | |
US5603135A | Pool cleaner with replaceable mast |