Patent Assignment
Reel/Frame 006461/0436
Assignment of Assignors Interest.
Recorded: 1992-11-06
Pages: 2
Assignors
PIEFENBRINK, WILFRIED
Executed: 1992-11-03
WEBER, WALTER
Executed: 1992-11-03
HAMBURGER, HERMANN
Executed: 1992-11-03
Assignees
WIRTH MASCHINEN-UND BOHRGERATE-FABRIK GMBH
KOLNER STRASSE 71-78, D-5140 ERKELENZ (DE), STATELESS
HDRK MINING RESEARCH LIMITED
3499 WASS CRESCENT, OAKVILLE, ONTARIO L6L 6G3 (CA), STATELESS
Covered Property
(1)
Method and Machine for Excavating Drifts, Tunnels, Stopes, Caverns or the Like
Patent:
5,340,199 →
Application:
07/946,338 →
Related Assignments
(2)
Other recorded transfers of the patent in this record — the chain of ownership.