Indefiniteness

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Dao Health v. Shenzhen Lutejiacheng Technology Co., Ltd., No. 23 C 4885 (N.D. Ill. Dec. 12, 2025) (Durkin, J.)

Judge Durkin construed seven disputed terms across three patents involving a hands-free breast milk collection device and a related valve, rejecting indefiniteness challenges and clarifying several scope disputes in this patent matter.

Of particular note…

Lecat’s Ventriloscope v. MT Tool & Mfg., No. 16 C 5298, Slip Op. (N.D. Ill. Nov. 20, 2018) (Castillo, C.J.).

Chief Judge Castillo granted in part each parties’ cross-motion for summary judgment in this patent case involving a training system for ausculation – the act of listening to sounds within the body to diagnose…

Kolcraft Enters., Inc. v. Chicco USA, Inc., No. 09 C 3339, Slip Op. (N.D. Ill. Apr. 13, 2018) (Chang, J.).

Judge Chang construed claims in this patent dispute involving infant play gyms for a second time, this time focused upon certain apparatus claims.

Of particular note, the Court construed the following:

  • “Connector” was not

…

R-Boc Reps., Inc. v. Minemyer, No. 11 C 8433, Slip Op. (N.D. Ill. Cole, Mag. J.).

Judge Cole denied plaintiff R-Boc’s motions to amend its Final Invalidity Contentions with an allegedly new theory regarding the phrase “approximately perpendicular” based upon the Supreme Court’s Nautilus indefiniteness decision and related motion for summary judgment of invalidity…