Approximately how many patents did Nikola Tesla obtain worldwide? The answer is about 300 patents. Researchers have identified at least 278 patents issued to Tesla in 26 countries, while broader historical counts commonly round the total to approximately 300.
Tesla's patents covered inventions and improvements in alternating-current power, motors, transformers, lighting, wireless communication, radio control, and other electrical technologies. Many were filed in the United States, Britain, and Canada, but his patent activity extended across multiple countries. The international total reflects the fact that an invention could be patented separately in different jurisdictions.
The figure is approximate because some patents were overlooked in archives, rediscovered later, or attributed through complicated arrangements involving collaborators and companies. Tesla also developed ideas that he never patented, so the patent count does not represent everything he invented. A useful neighbouring fact is that his 1898 radio-controlled boat was patented as a method for controlling moving vessels remotely, helping establish an early foundation for modern remote-control technology.