Franz-josef Püttmann

2 Patents

• US119709092024

  Drill Bit of a Ground Drilling Device with an Enlargement of a Receptacle for Fastening an Attachment Thereto and Method for Producing Same

  TRACTO-TECHNIK GmbH & Co. KG

  0 cites
• US117677162023

  Drilling Head for a Percussive Displacement Ground Drilling Device and Use of a Drilling Head for a Percussive Displacement Ground Drilling Device

  TRACTO-TECHNIK GmbH & Co. KG

  0 cites