A more thorough explanation:

An examiner is a person who is authorized to conduct an examination. This can refer to different types of examiners:

A court examiner is a person appointed by the court, especially a court of equity, to administer an oath and take testimony. This person is responsible for conducting an examination to gather evidence and information related to a legal case. For example, in a divorce case, a court examiner may be appointed to investigate the financial situation of the parties involved.

A patent examiner is a person responsible for determining the patentability of an invention submitted to the patent office. This person reviews patent applications and conducts a thorough examination to determine if the invention meets the requirements for patent protection. For example, a patent examiner may review an application for a new type of computer software to determine if it is novel, non-obvious, and useful.

A medical examiner is a person responsible for investigating deaths that occur under unusual or suspicious circumstances. This person conducts autopsies and other tests to determine the cause of death. For example, a medical examiner may investigate a death that occurred during surgery to determine if it was caused by medical malpractice.

Overall, an examiner is someone who conducts an examination to gather information or evidence related to a specific area of expertise.