It's important that you installed the correct opener for the type of door that you have, as some openers are more qualified to lift heavy door varieties than others. By making sure you have a good match, you can keep the cost to repair a garage door opener down from the beginning.
National Phase: after the end of the PCT procedure, usually at 30 months from the earliest filing date of your initial application, from which you claim priority, you start to pursue the grant of your patents directly before the national (or regional) patent Offices of the countries in which you want to obtain them.
The priority date is the earliest date to which a patent application can claim priority. The priority date defines what materials are prior art to the patent application; thus, obtaining the earliest possible priority date can be important to the patentability of some inventions. In some cases, the filing date sets the priority date.