Douglas J. D'Jay

États‑Unis d’Amérique

 
Quantité totale PI 1
Rang # Quantité totale PI 1 258 280
Note d'activité PI 0/5.0    0
Rang # Activité PI 1 661 095

Brevets

Marques

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Dernier brevet 2020 - Systems and methods for adjustab...
Premier brevet 2017 - Systems and methods for trekking...

Derniers inventions, produits et services

2019 Invention Systems and methods for adjustable length weighted trekking poles. Systems, methods, and articles...
2017 Invention Systems and methods for trekking pole weights. Systems, methods, and articles of manufacture for ...