Blog Tag: knee implant

Surgeon wins $20M jury verdict against DePuy Synthes for Infringement of Knee Prosthesis Patents

Rasmussen Instruments, LLC (“Rasmussen”) won a $20M jury verdict against DePuy Synthes (“Depuy”), a part of Johnson & Johnson Medical Devices Companies. Rasmussen asserted Patent Nos. US 9,492,180 (‘180 patent) and US 10,517,583 (‘583 patent), both titled “Arthroplasty systems and methods for optimally aligning and tensioning a knee prosthesis,” against DePuy’s “Balanced Sizer” product for its Attune® Knee System

According to the complaint filed in 2020, Dr. G. Lynn Rasmussen is an orthopedic surgeon based in Murray, Utah, with over 40 years of experience in reconstructive orthopedic surgery and is the sole member and owner of Rasmussen.  Both the ‘180 patent and ‘583 patent claim priority to a provisional application filed in 2005 by Dr. Rasmussen.  The complaint alleges that the ‘180 patent and ‘583 patent “describe and claim . . . a device for maintaining the tension in the ligaments of a knee joint and/or adjusting the alignment of a knee joint during knee replacement surgery.” 

According to the complaint, from 2012 to 2014, Dr. Rasmussen discussed licensing the patented technology with DePuy, but after the negotiations broke down, Rasmussen initiated litigation against DePuy.  After a trial in March of 2022, the jury decided that DePuy’s “Balanced Sizer” product infringed the ‘180 patent but did not infringe the ‘583 patent. The jury also decided that DePuy’s infringement of the ‘183 patent was willful and that Rasmussen’s damages were therefore $20 million.  The jury also held that the ‘180 patent and the ‘583 patent were not invalid.

The case is No. 1:20-CV-11807-WGY in the U.S. District Court for the District of Massachusetts, Eastern Division.  

Find additional information and resources for the medical device community at Knobbe Medical.

Wright Medical To Sell Tornier Business to Corin for $33 Million

According to press releases, Wright Medical Group N.V. plans to sell its Tornier hip and knee business to Corin Orthopaedics Holdings Ltd. for about $33 million in cash.  This deal comes shortly after Wright and Tornier merged in October 2015. Wright has sold assets in the hip and knee space in the past.  In June 2013, Wright sold its OrthoRecon business to Hong Kong based MicroPort for $290 million.

In a statement, Robert Palmisano, president and chief executive officer of Wright, stated:

Our large joints business has excellent products and significant market share in key European markets with a loyal customer base.  However, this business is not in line with our strategy to be the premier extremities and biologics company.

Stefano Alfonsi, chief executive officer of Corin, commented, “We are delighted with the acquisition of Tornier’s clinically proven portfolio of hips and knees.”  The acquired portfolio is said to include hip and knee implants sold primarily in France and other European countries.  The franchise brands include the Dynacup® and Meije Duo® hip implants and the HLS KneeTec® and HLS Noetos® knee implants.

Corin is a European Orthopaedic manufacturer based in Cirencester, England.

Wright Medical Group N.V. is a global medical device company that provides surgical solutions including for the upper extremities (shoulder, elbow, wrist, and hand), lower extremities (foot and ankle), and biologics markets.