Inventor · disambiguated record
David R. Hazen
Also filed as: HAZEN DAVID R
4 granted patents·62 citations·filing 1975–1978
77Inventor score
Top patents by PatentIndex Score
4 records- 0176US4387798ACascading conveyor systemCONSOLIDATION COAL CO·Filed 1978·Granted Jun 14, 1983·26 cites·5 claims
- 0276US4036529ASupport system for a unitized pair of auger conveyorsCONTINENTAL OIL CO·Filed 1975·Granted Jul 19, 1977·20 cites·5 claims
- 0364US4021076AWire communications channel for a pair of unitized augersCONSOLIDATION COAL CO·Filed 1975·Granted May 3, 1977·12 cites·6 claims
- 0429US4015674AApparatus for unitizing a pair of augersCONSOLIDATION COAL CO·Filed 1975·Granted Apr 5, 1977·4 cites·7 claims
Join the waitlist — get patent alerts
Get an alert when David R. Hazen files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →