Patent Information
Publication number: US382845 A
Patent Title: Commutator for dynamo-electric machines
Publication type: Grant
Publication date: May 15, 1888
Filing date: Apr 30, 1887
Inventors: Nikola Tesla
Original Assignee: P One
Critical Features disclosed in this patent
1. Relates to dynamo-electric machines or motors;
2. Avoids destruction and wear of machine;
3. Enable practical construction of very large dynamo electric machines
Note: Nikola Tesla was an inventor who obtained around 300 patents worldwide for his inventions. Some of Tesla’s patents are not accounted for, and various sources have discovered some that have lain hidden in patent archives. There are a minimum of 278 patents issued to Tesla in 26 countries that have been accounted for. Many of Tesla’s patents were in the United States, Britain, and Canada, but many other patents were approved in countries around the globe. Many inventions developed by Tesla were not put into patent protection.
Reference: https://en.wikipedia.org/wiki/List_of_Nikola_Tesla_patent