you can sell it.
Yes
Several telegraphs were patented in the UK and US in 1837, none by Edison. The US patent was awarded to Samuel Morse. Edison did patent the Phonograph in 1877.
The first patent (UK) in 1691. Then Jacob Schaffer (Germany) 1767. UK patent To Henry Sidgier for first rotating drum machine in 1782 . The first US Patent in 1797 was awarded to Nathaniel Briggs.
Typically you would want to protect your product through trademark or (if it's an invention) patent law, rather than copyright. The US Patent and Trademark Office has very clear walkthroughs on its website (link below); outside the US, your country's trademark and/or patent office likely has a similar process.
how to sell a any product
Prestige Washroom online sell this type of product. They sell different kinds of changing table for babies and toddlers. They offer free shipping for customers residing in US and UK.
You can sell a digital product in the US by creating an online market or website that sells the product. You could advertise the product on websites that have similar products or through newspapers or magazines or on television.
Marconi had 33 US patents and 6 UK patents, for developments in wireless telegraphy.
This can be read two ways. Why the government? Because the patent process requires examination (to see if a new application is a duplicate of a previous patent), it needs to be handled by a centralized body. In the US, the Patent and Trademark Office is part of the Department of Commerce, which enables international dialog as well. Why issue patents? To protect creators and researchers, and to encourage them to develop more products and processes by allowing them to derive an income from their creative output.
You could apply for a patent. Contact the US Patent Ofiice for information on how.
(Answer keyed for the US but applies generally in other countries) First, you should be sure that the product actually has a valid patent that gives someone else the exclusive right to make, use, sell, offer to sell, or import the patented item. This can be a tricky exercise because it requires skill in interpreting patent rights. Assuming that such a patent exists, you should then determine whether the patent covers the whole product or just a piece (for example, a single gear in a machine or the machine itself. if enough money is involved, you may want to get a formal clearance opinion (also called a freedom to practice opinion) from qualified and competent patent counsel. The general rule is that you need the patent holder's permission. You can get that by: 1. Purchasing the patent itself and becoming the patent holder; 2. Purchasing permission in the form of a license to the patent; or 3. Purchasing the patented item from the patent holder or an authorized licensee of the patent and reselling the item (this implicates something called patent exhaustion). This can be an exceptionally tricky area with very high stakes from both legal and business perspectives. You would be well advised to obtain the services of an experienced patent attorney who can advise you properly.
what is the US patent 878354 A