The report contains ten-year analysis with the following sections
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xizi otis elevator company | 198 |
otis elevator company | 42 |
xizi otis elevator company | 14 |
otis elevator company | 7 |
Title of patent family (most common patent title) |
Family members |
Filing year |
---|---|---|
escalator handrail chain | 13 | 2009 |
rust removing device for elevator guide rail | 7 | 2013 |
detection method for elevator brake moment | 7 | 2013 |
profile track integrated drive system | 7 | 2009 |
elevator synchronous door knife | 5 | 2015 |
landing-door door lock device | 5 | 2014 |
asynchronous door knife of elevator integrated car door lock | 4 | 2013 |
a mobile car sheave shield | 4 | 2013 |
short-circuit tool for safety return circuit in elevators | 3 | 2010 |
bending ground ridge | 3 | 2009 |