Hoekstra; Arend Tjeerd
Patent Applications and Registrations
Patent applications and USPTO patent grants for Hoekstra; Arend Tjeerd.The latest application filed is for "soil probing device having a string of flexibly connected rod sections".
- Hoekstra; Arend Tjeerd - Heerenveen NL
| Patent | Date |
|---|---|
| Soil probing device having a string of flexibly connected rod sections Grant 10,316,482 - Hoekstra | 2019-06-11 |
| Soil Probing Device Having Threaded Male And Female Bayonet Columns App 20160305859 - Hoekstra; Arend Tjeerd | 2016-10-20 |
| Soil Probing Device Having A String Of Flexibly Connected Rod Sections App 20160305081 - Hoekstra; Arend Tjeerd | 2016-10-20 |
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