Hitachi Koki Co., Ltd. v. Dudas

556 F. Supp. 2d 41, 2008 U.S. Dist. LEXIS 41614, 2008 WL 2323527
CourtDistrict Court, District of Columbia
DecidedMay 29, 2008
DocketCivil Action 07-01504 (ESH)
StatusPublished
Cited by6 cases

This text of 556 F. Supp. 2d 41 (Hitachi Koki Co., Ltd. v. Dudas) is published on Counsel Stack Legal Research, covering District Court, District of Columbia primary law. Counsel Stack provides free access to over 12 million legal documents including statutes, case law, regulations, and constitutions.

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

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.)

The Board then determined that persons having ordinary skill in the art would have learned from three prior references that displacing the saw blade parallel from its motor by a distance greater than the radius of the circular saw blade permits the tilting of the saw to achieve 45 degree cuts without obstruction. The Board found that the Johnson patent, U.S. Patent 4,574,670, discloses a cutting machine that permits multiple angle cutting of at least 45 degrees to either side of the zero-tilt and a person having ordinary skill in the art “would have understood from Johnson’s teaching that the sizes and configurations of his composite driving motor ..., drive train ..., and cutting member ... impart ±45° capability to the cutting member.” (Id. at 17.) The Board next considered the Langworthy patent, U.S. Patent 1,417,669, which also shows “a motor shaft ... disposed in parallel with and above said saw shaft; and the transmission means through which the motor shaft is connected to the saw shaft so that the axis of the motor shaft is shifted from an axis of said saw shaft by a distance which is greater than the radius of said circular saw blade.” (Id. at 18.) The Board noted that although Langworthy is a surgical saw, it teaches that “[t]he saw may be of various sizes, complementary to the saw ... and these elements may be changed at will, to adapt them for different uses.” (Id. at 19 (quoting Joint Ex. 6 [Langwor-thy Patent] p. 2, col.

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556 F. Supp. 2d 41, 2008 U.S. Dist. LEXIS 41614, 2008 WL 2323527, Counsel Stack Legal Research, https://law.counselstack.com/opinion/hitachi-koki-co-ltd-v-dudas-dcd-2008.