IP Library › Granted Patent US 904,475
Granted Patent S1
US 904,475 · App. 29/733,080 · Granted Dec 8, 2020

Tandem sub

Inventors: Frank Haron Preiss (Bonn, DE); Liam McNelis (Bonn, DE); Eric Mulhern (Edmonton, CA); Thilo Scharf (Letterkenny, IE); David C. Parks (Calgary, CA)
Assignee: DynaEnergetics Europe GmbH
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Quick Facts
Patent No.
US 904,475
App. No.
29/733,080
Granted
Dec 8, 2020
Kind
S1
Claims (1)

We claim the ornamental design of a tandem sub, as shown and described.

Assignments (7)
CONFIRMATORY PATENT RIGHTS ASSIGNMENT Recorded Feb 20, 2025
From: SWM INTERNATIONAL LLC; JDP ENGINEERING & MACHINE INC.; PELICAN ENERGY PARTNERS III LP
To: DYNAENERGETICS EUROPE GMBH
Reel/Frame 070287/0448 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 30, 2020
From: MULHERN, ERIC
To: DYNAENERGETICS CANADA INC.
Reel/Frame 052542/0056 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 30, 2020
From: DYNAENERGETICS CANADA INC.
To: DYNAENERGETICS GMBH & CO. KG
Reel/Frame 052542/0086 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 30, 2020
From: PREISS, FRANK H.; MCNELIS, LIAM; SCHARF, THILO
To: DYNAENERGETICS GMBH & CO. KG
Reel/Frame 052542/0039 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 30, 2020
From: JDP ENGINEERING AND MACHINE INC.
To: DYNAENERGETICS EUROPE GMBH
Reel/Frame 052542/0244 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 30, 2020
From: DYNAENERGETICS GMBH & CO. KG
To: DYNAENERGETICS EUROPE GMBH
Reel/Frame 052545/0563 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 30, 2020
From: PARKS, DAVID C.
To: JDP ENGINEERING AND MACHINE INC
Reel/Frame 052542/0120 →