no but i have one & would like to know what it is used for
United States Patent #51223123 does not exist. The highest US patent number as of 05-28-2010 is 7,725,947.
A patent number will only tell you the EARLIEST date on which the device was manufactured, and the patent number could still be put on many years after the patent expired (although without any legal effect). For U.S. patents, go to USPTO.gov, click patent, search, and type in the number to find the image of the particular patent you're interested in (prior to 1976).
If it is a U.S. patent, you can go to the USPTO website for patent searches and enter the number in "patent number search".
Patent pending is a warning that a patent application has been filed. It is completely worthless until and unless a patent is actually issued for that invention. Patent number notice means a patent with that number was issued for the invention that is implemented in the product labeled with that number.
There is no specific patent number for the mailbox.
the patent number is 5209584
Abraham Lincoln is the only president to have been granted a patent. He received Patent 6469 in May of 1849 for a device to lift boats over shoals.
It was for a dredging device for canals.
A patent number is the code that helps identify an invention.
Lincoln was granted a patent for a device to lift boats over shoals.
To find a patent number for a specific invention, you can search the United States Patent and Trademark Office (USPTO) website. Use keywords related to the invention to locate the patent in the database. The patent number will be listed on the patent document once you find it.
The US patent number is US 7198789 B2.