Use this link to research US Patent Numbers:
http://patft.uspto.gov/netahtml/PTO/srchnum.htm
The patent issue date for the keyword was on specific date.
To reference a U.S. patent in a bibliography, include the inventor's name, the title of the patent, the patent number, the date of issue, and the issuing authority. The format typically follows this structure: Inventor(s). Title of Patent. U.S. Patent Number, Date of issue. For example: Smith, John. Method for Efficient Energy Use. U.S. Patent 1234567, Jan. 1, 2020.
Anything that was collected and patent in the year it was made, an issue year can be determined between partners or individual on an exact date and time...
US patents are for 20 years, so a 1992 patent expired on its issue date in 2012.
To determine the expiration date of a patent, you can look up the patent number on the United States Patent and Trademark Office (USPTO) website or contact the USPTO directly. Patents typically last for 20 years from the filing date of the application.
The date the patent was granted.
To cite a patent in APA format, include the inventor's name, the patent number, the title of the patent, the publication date, and the source of the patent. Format it as follows: Inventor(s). (Year). Title of patent (Patent No. xxxxxx). Source.
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).
That patent date is found on shotguns manufactured by J. Stevens Arms & Tool Co.
If that is a US Patent, you can look it up on Google, and tell when the patent was issued, but it cannot date the gun- other than we know it would have been made AFTER the patent was issued.
The patent expiration date for a specific invention is typically calculated 20 years from the filing date of the patent application.
Is was made in 1919, that is the patent date. I suspect I have the patent posted in the patent section of the Gallery on the Remington Society of America if you want to see it...