About Henry Klingenstein
Henry Klingenstein is a director of Drowsy Digital, Inc., which makes Ozlo wireless earbuds designed for sleep.
Experience
This experience comes from official bios and from SEC filings. For roles taken from filings, the years are when the filings name Henry Klingenstein in the role, so the role may have started earlier or lasted longer.
Drowsy Digital, Inc. Current
Director
2026 – Present · Marlborough, MA
Ozlo makes small wireless earbuds designed to be worn during sleep, aiming to help people rest better.
Key Colleagues at Startups
The people Henry Klingenstein works with at each company, as listed on that company's latest Form D.
Drowsy Digital, Inc. · Form D, Oct 29, 2026
CT
Charles Taylor
Executive officer
NP
Naganagouda Patil
Chief Executive Officer and director
SA
Sahirzeeshan Ali
Director
KM
Kostas Mallios
Director