Hitachi Koki Co., Ltd. v. Dudas

556 F. Supp. 2d 41, 2008 U.S. Dist. LEXIS 41614, 2008 WL 2323527
District Court, District of Columbia·Decided May 29, 2008·No. Civil Action 07-01504 (ESH)·Published·Cited by 6 cases

Opinion

MEMORANDUM OPINION AND ORDER

ELLEN SEGAL HUVELLE, District Judge.

Plaintiff Hitachi Koki USA, Ltd. (“Plaintiff’ or “Hitachi”) seeks review under 35 U.S.C. § 145 of a decision of the United States Patent and Trademark Office’s Board of Patent Appeals and Interferences (the “Board”) denying Hitachi a patent for its desktop cutting machine with a tiltable saw. Before the Court are the parties’ cross-motions for summary judgment.

BACKGROUND

On January 20, 1995, the United States Patent and Trademark Office (“USPTO” or “PTO”) issued U.S. Patent Number 5,425,294 to Hitachi. (Pl.’s Stmt of Disputed and Nondisputed Material Facts [“Pl.’s Stmt Facts’ ”] at No. 1.) On June 20, 1997, Hitachi filed a reissue application resulting in claims 1-3, 26, 27, 37, 48-56, and 58-62. {Id. at No. 2.) Pursuant to 35 U.S.C. § 251, a patentee may surrender a patent if a defect is found. A reissue application is examined in the same manner as a newly submitted application and is subject to the same requirements that govern newly submitted applications. See 37 C.F.R. § 1.176(a).

After reviewing Hitachi’s reissue application, the examiner denied Claims 1-3, 26, 27, 37, 48-56, and 58-62 as unpatentable under 35 U.S.C. § 103(a), which bars the issuance of a patent if “the differences between the subject matter sought to be *43 patented and the prior art are such that the subject matter as a whole would have been obvious at the time the invention was made to a person having ordinary skill in the art to which said subject matter pertains.” 35 U.S.C. § 103(a). (See Joint Ex. 4 [“Final Office Action”].) Plaintiff appealed to the Board, but requested only that the Board review Claim 1. (Ex. 2 [Board Decision on Appeal (Oct. 19, 2006) ] at 3 (“For the convenience of the Board, Appellant will argue the patentability of independent claim 1. The other claims stand or fall together with claim 1.”).) Claim 1 of the reissue application provides for:

A desk-top cutting machine, comprising: a base on which a workpiece to be cut is supported, said base including a top surface;
a turntable rotatably disposed in said base and including a top surface;
a holder supported by said turntable for tilting transversely in opposite directions about a zero-tilt angle position;
a circular saw blade;
a saw shaft located above said holder for supporting said saw so that said saw is swung up and down relative to said base, about a pivot shaft;
a circular saw assembly having a motor covered by a housing;
a motor shaft of said motor being disposed in parallel with and above said shaft;
transmission means through which said motor shaft is connected to said saw shaft so that an axis of said motor shaft is shifted from an axis of said saw shaft by a distance which is greater than or equal to the radius of said circular saw blade, wherein when said holder is tilted in either of said opposite directions by an angle greater than or equal to 45 degrees with respect to the zero-tilt angle position, said housing does not contact said top surface of said base.

(Pl.’s Stmt Facts at No. 3.)

The Board affirmed the denial of Claim 1. The Board first found that prior art U.S. Patent 5,357,834 issued to Ito et al. (“Ito”) describes every aspect of desktop cutting machine defined in Hitachi’s Claim 1 except that it does not have “a motor shaft of said motor being disposed in parallel with and above said saw shaft” or “transmission means through which said motor shaft is connected to said saw shaft so that an axis of said motor shaft is shifted from an axis of said saw shaft by a distance which is greater than or equal to the radius of said circular saw blade, wherein when said holder is tilted in either said opposite directions by an angle greater than or equal to 45 degrees with respect to the zero-tilt angle position, said housing does not contact said top surface of said base.” (Joint Ex. 2 at 12-13.) 1 The Board then went on to consider whether persons having ordinary skill in the art would have had the idea and ability to make these modifications to permit 45 degree descensión of the saw in both directions from the zero-tilt, and it concluded that they would.

The Board found that plaintiffs Admitted Prior Art (“AAPA”) 2 and Ito disclose the problem that Hitachi’s design was created to solve. They show that the housing for the motor driving the motor shaft on a conventional miter saw prevents the user *44 from making cuts at a 45-degree angle to either side of zero-tilt because when tilted in one direction, the housing for the motor makes contact with the surface of the workpiece base. (Id. at 15.) Ito attempted to address this problem by placing the motor shaft and the saw shaft in separate, intersecting planes connected by beveled gears. (Id. at 14-16.)

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Hitachi Koki Co., Ltd. v. Dudas, 556 F. Supp. 2d 41, 2008 U.S. Dist. LEXIS 41614, 2008 WL 2323527 (D.D.C. 2008).

556 F. Supp. 2d 41 (Hitachi Koki Co., Ltd. v. Dudas) — published by Counsel Stack Legal Research, free access to 12M+ legal documents.

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