Yenzer v. Agrotors, Inc.

764 F. Supp. 974, 20 U.S.P.Q. 2d (BNA) 1198, 1991 U.S. Dist. LEXIS 6957, 1991 WL 87211
CourtDistrict Court, M.D. Pennsylvania
DecidedApril 23, 1991
DocketCiv. A. 3:CV-90-1950
StatusPublished
Cited by2 cases

This text of 764 F. Supp. 974 (Yenzer v. Agrotors, Inc.) is published on Counsel Stack Legal Research, covering District Court, M.D. Pennsylvania primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

Bluebook
Yenzer v. Agrotors, Inc., 764 F. Supp. 974, 20 U.S.P.Q. 2d (BNA) 1198, 1991 U.S. Dist. LEXIS 6957, 1991 WL 87211 (M.D. Pa. 1991).

Opinion

MEMORANDUM

RAMBO, District Judge.

Plaintiffs Scott Yenzer and Haverfield Corporation have filed a motion for a preliminary injunction to prevent defendant Agrotors, Inc. from allegedly infringing on a patent owned by Yenzer and licensed to Haverfield. The motion has been exhaustively briefed, and on April 4, 1991 a hearing, which took the form of oral argument, was held on the issues presented by the motion.

Background

In late 1983 through mid-1984, plaintiff Yenzer began to experiment with a device and technique for servicing and maintaining high voltage power transmission lines by helicopter. The relevant portions of his invention included a metal, laterally extending platform which was attached to the helicopter’s skid tubes. 1 On one side of the platform, a workman sits with his back to the cabin door and legs dangling over the side. From this vantage point he inspects or works on the lines. The other end of the platform has equipment to balance out the weight. Yenzer’s servicing technique for energized power lines consists of the helicopter hovering a few feet from the high voltage line and the workman, sitting on the platform in an electrically conductive suit, making an electrical connection from the line to the platform, suit, and helicopter so that the entire system becomes energized to the voltage of the power line. 2 The workman then performs whatever maintenance is necessary.

Prior to the use of helicopters in maintaining and repairing these power lines, power companies were forced to rely on slow and often cumbersome techniques. Some methods are designed for use on a live line, using insulated tools and ladders to perform repairs or using the “bare hand” technique where the lineman electrically couples himself to the line and becomes energized himself, with some form of insulation preventing an electrical connection with the ground. Other servicing would be performed with the lines deener-gized, which could at the least require serious planning to find alternate transmission routes and at most could result in the disruption of customer service.

Most live line servicing had been performed using insulated bucket trucks, in which the workman would stand in the insulated bucket and perform the necessary work. Use of a truck, however, has natural limitations. It cannot set up on water or other impassable terrain, nor can it set up under planted farm land or envi *977 ronmentally sensitive areas without damaging the crops or the natural land below.

Another technique for working on live lines is the use of a cart which is attached to the power lines and rolls along the lines until it reaches position. The lineman then works from the cart to repair the lines. This can be a time consuming process, however, for each time the cart reaches an obstacle on the line like a spacer or insulator, the cart must be detached and reattached.

On October 4, 1984, Yenzer applied for a patent for his apparatus and technique. Just over two years later, on January 20, 1987, he was granted United States Patent number 4,637,575 (the “ ’575 patent”). Sometime in September 1990, plaintiffs first became aware that defendant Agro-tors, a well established company which performs various helicopter services including crop spraying and the like, had developed a system which looked suspiciously like the one Yenzer had patented. Like the Yenzer patent, the Agrotors design included a laterally extended platform on which a workman would sit, energized to the potential of the line along with the helicopter, and work on the high voltage lines. Unlike the Yen-zer device, however, Agrotors platform was not made of metal (or any other electrically conductive material) or connected by separate wires to the fuselage of the helicopter. In addition, the Agrotors platform was fastened directly to the fuselage, not the skid tubes like the Yenzer version.

In November 1990, Yenzer and Haver-field filed an action for infringement of the ’575 patent and for deceptive and unfair trade practices. Agrotors filed an answer and asserted a counterclaim for the declaration of the invalidity, noninfringement and unenforceability of the ’575 patent. In March 1990, plaintiffs filed this motion for a preliminary injunction.

Discussion

In patent cases, a court may issue a preliminary injunction where:

1)The patentee has a reasonable likelihood of success on the merits;
2) the patentee will be irreparably harmed if the injunction does not issue;
3) the threatened injury to the patentee outweighs the threatened harm the injunction may cause the alleged in-fringer; and
4) the granting of the preliminary injunction will be in the public interest.

Roper Corp. v. Litton Systems, Inc., 757 F.2d 1266, 1269. (Fed.Cir.1985). Courts in general have recognized that where there is a reasonable likelihood that a patent is being infringed, there may be a special need for injunctive relief to stem any damage done to a plaintiff. See Augat, Inc. v. John Mezzalingua Assocs., Inc., 642 F.Supp. 506, 508 (N.D.N.Y.1986) (“Unlike the more usual case in which courts inquire into whether money damages will adequately compensate an injured plaintiff, patents are afforded special protection.”); Pittway v. Black & Decker Corp., 667 F.Supp. 585, 593 (N.D.Ill.1987) (“in patent cases protection usually requires immediate injunctive relief”).

I. Reasonable Likelihood of Success on the Merits

To determine whether plaintiff has a reasonable likelihood success on the merits, the court must be satisfied that plaintiff will win on both the issues of the validity and the infringement of his patent. See Hybritech, Inc. v. Abbott Laboratories, 849 F.2d 1446, 1451 (Fed.Cir.1988).

A. Validity of the Patent

Patents are born valid. The burden of proving a patent or a claim within a patent invalid is on the person asserting the invalidity. Roper Corp. v. Litton Systems, Inc., 757 F.2d 1266, 1270 (Fed.Cir.1985). The challenger must demonstrate invalidity by clear and convincing evidence. Bausch & Lomb, Inc. v. Barnes-Hind/Hydrocurve, Inc., 796 F.2d 443, 446 (Fed.Cir.1986), ce rt. denied, 484 U.S. 823, 108 S.Ct. 85, 98 L.Ed.2d 47 (1987). In a preliminary injunction setting, the burden is arrayed as follows: plaintiffs must show by a preponderance of evidence that defendant will fail to meet its burden of proving the invalidity *978 of the patent by clear and convincing evidence. E.I. du Pont de Nemours Co. v.

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