According to an article by, Inogen Inc has disclosed a data breach that gave hackers access to customer information.

Inogen, which produces and sells portable devices to people with chronic respiratory issues, said in a Securities and Exchange Commission filing that “unknown persons” from outside the company obtained unauthorized access to employee emails.

Inogen said the breach occurred some time between Jan 2 and March 14 this year, but did not say when it was discovered.

The company believes some of those emails possibly had sensitive information relating to Inogen’s rental customers. The filing does not say how the unauthorized access occurred.