Remove trigger pin with action un-cocked . http://www.histandard.info/manuals/sears/rfrifles/index.html
The wooden forend on that gun extends back along both sides of the receiver. There is a big honking screw that goes through the wood and the receiver from left to right. Remove that screw and you will be able to remove the trigger group downward and rearward. Please be careful not to lose the disconnector from the right side of the trigger group. Do not dry fire the trigger group. In fact, my advice is not to attempt to disassemble the trigger group unless you are very familiar with that action. It is easy to take apart, but difficult to reassemble. sales@countrygunsmith.net
Patent 2,573,254 has a date of Oct 30 1951, and refers to a combination bridge and pickup assembly for string instruments. The patent was filed Jan 13 1950. I have a picture of this patent in a book, the instrument pictured has 6 strings.
The Bulldog
$60 to $100
that's the patent date on a New Model, the W on the trigger guard would be an inspectors mark and indicate a military firearm. There should be others on the frame and a cartouche if still visible on the left grip.
A patent is a grant from a patent office, such as the United States Patent Office. "Patent Pending" is a phrase that an application for a patent has been filed and is in some stage in the process of obtaining a patent. Thus, a patent can be presently enforced while a patent that is merely pending is unenforceable but can mature into a patent that can be enforced. Once the pending patent matures, the patent owner can sue for back damages or reasonable royalties starting from the filing date of the patent.
Iver Johnsons can be hard to identify. Would need to know if it has the tip-up frame or a solid frame, what the patent dates are and where the patent dates are located. sales@countrygunsmith.net
1832.Samuel Colt first attempted to patent a revolver in the US in 1832. UK Patent #6909 was his first successful revolver patent: it was issued in 1835.1836Samuel Colt's first U. S. patent was patent No. 1304, dated August 29, 1836. This patent protected the basic design of his revolving-breech loading, folding trigger firearm named the Paterson pistol. Previous to his American patent he had been awarded a patent in England (1935) for the same design.1836Samuel Colt invented the first revolver, a gun named after its inventor "Colt", and after its revolving cylinder "revolver". In 1836, Samuel Colt was granted a U.S. patent for the Colt revolver, which was equipped with a revolving cylinder containing five or six bullets and an innovative cocking device.
1974
Mid 1950's. Value up to $140. http://www.histandard.info/PDF/Sears%20Rifles.pdf
There are not training offered from the patent office on getting a patent. The patent office advises you to seek guidance from a trademark/patent attorney. A good attorney is highly suggested by the patent office. As a convenience, they have a roster of local Patent Attorneys.
Patent revocation is the removal of patent protection from an invention.