Lawsuit at issue
Pony Corp. （”P”）
Patentee of a patent regarding aninvention with the title of “Position
Detector” (the “Present Invention”)*Patent Number: 202111020*Date of Application: Apr. 16, 2006
*Date of Registration: Jan. 26, 2008

Donkey Corp. (“D”)
Company that manufactures and sells
position detectors with the productname “D-Pointer” (the “Defendant’sPosition Detector(s)” and replaceable
styluses (the “Defendant’s Stylus(es)”)*started manufacturing and selling theDefendant’s Position Detectors and theDefendant’s Styluses on Apr. 1, 2020

P filed a patent infringement lawsuit against D on Aug. 17, 2020, seeking:*injunction against the manufacture and sale of the Defendant’s Position Detectors*injunction against the manufacture and sale of the Defendant’s Styluses

1What is a position detector ? (1)“Machining center”
A machining center is a machine tool that has an automatic tool changer enabling automatic change oftools and is equipped with a numerical controller. With a numerical control program, it can continuously
perform various machining by automatically taking out the necessary tools from the tool magazine where
various kinds of tools are stored, and setting them on the main shaft of the machining center.

多種類の工具がA tool magazine storing
various格納された
types of tools isaccommodated
ツールマガジンを収容

ディスプレイ
Display

操作盤
Operation panel
Tools
can be
工具をautomatically
自動で交換changed

PalletPallet
パレット

Tool
工具

Main
shaft
主軸2

What is a position detector? (2)“Position detector”
A position detector determines a machining position of a workpiece andmeasures dimensions of workpiece after machining. It is useful for
realizing high-precision machining and preventing machine defects.
Machining centerPosition detector

Main
body
Main shaft

Main
body

Enlarged
StylusWorkpiece
Pallet3What is a position detector? (3)Position
位置検出器
detectorz

StylusスタイラスxWorkpiece
ワーク原点
originyワーク
Workpiece

Setting a corner of a workpiece as the
工具，ワーク等の位置をworkpiece origin using a position
座標値で示すために，
detector to indicate the positions of the
位置検出器を用いて
tool, workpieceand other objects in
ワークの角をワーク原点として設定
coordinate values

Creatinga machining program that
ワーク原点を基準とする
defines座標値を用いて，necessary matters like themovement path of the cutting tool
切削工具の移動経路等を定めたusing the coordinate values based
加工プログラムを作成
on the workpiece origin

Measuringwhether the product after
位置検出器を用いて，machining 加工後の製品が，has the shape and dimensions
asset in the machining program by using
加工プログラムで設定されたとおりのthe position detector
形状寸法か否かを計測

4

What is a position detector? (4)“Energized type (External contact type)”Thestylus contacts the workpiece
スタイラスがワークに接触↓↓
A closed circuit is formed
閉回路を形成↓↓The LED comes on as current
電流が流れて，ＬＥＤが点灯
flows

本体
Mainbody

Contact
接触検出回路detection
circuitLEDMain body

本体

Focusing
on the main body of the
位置検出器の本体を中心に
position detector in a block
ブロック図で示すとdiagramResistance
工作機械
in the本体のmachinetool抵抗mainbody

Battery
電池

Current flow
電流の流れ

スタイラス
Stylus(* Must be an electrically conductive material)（＊電気を通す材質であることが必要）

電流の流れ
Current flow

ワーク
Workpiece(* Limited（＊鉄，アルミなどの電気を通す材質に限られる）
to an electrically conductive material such as iron, aluminum)

5What is a position detector? (5)“Internal contact type”
マシニングセンタのControl unitof the machining
center
制御装置

Main body

本体

赤外線受信部

Infrared receiver

赤外線発信部

Infrared transmitter

Contact接点

Contact接点
The stylus contacts the workpiece and tilts

スタイラスがワークに接触して傾斜↓A contact comes off↓the conductive support
接点が導電性支持体から外れて
and the current is cut off.
↓
通電が遮断Transmission from ↓the infrared transmitterto the control unit
赤外線発信部から制御装置へ伝達↓↓ where the current is
Detecting the position
通電が遮断される位置を検出
cut off

導電性支持体Conductivesupport
Stylusスタイラス(* An electrically non-conductive（＊電気を通さない材質でもよい）material
may be used)

Workpiece(* An electrically non-conductive
ワーク（＊電気を通さない材質でもよい）material may be detected)

6

Problem of the prior art/Purpose ofthe Present Invention
Problem:
Magnetization of the stylus causes a measurement error because the stylus in
the shape of an elongated needle slightly tilts by magnetic force.
As to the energized type position detector, a stylus may gradually bemagnetized as energized and non-energized states are alternately repeated.

Non-magnetic metal materials generally have low hardness, and wear anddeformation of the contacting portion at the end of the stylus cause a
If a workpiece is made of a magnetic
measurement error.
ワークが磁性体であると，material, the magnetized stylus will be
磁化されたスタイラスはStylus
スタイラス

pulled toward the workpiece and a
寄せつけられて測定誤差が生じる
measurement error will occur.

ワークWorkpiece7

Scope of Claims
A position detector comprising:A a micro-movable stylus held in a predeterminedstable position in an electrically insulated state;
anda main body including a contact detection circuit
connected to the stylus,
wherein contact between the stylus and aworkpiece is electrically detected as a result offormation of a closed circuit including the contact
detection circuit via the workpiece when acontacting portion of the stylus contacts theworkpiece, andB wherein the contacting portion of the stylus ismade of a non-magnetic material containing
tungsten carbide and a nickel binder.

8Outline of the Defendant’sPosition Detector (1)PositionDetector(Form α)A position detector comprising:BatteryA a micro-movable stylus held in apredetermined stable position in an electrically

Main
body

insulated state; and,a main body including a contact detection
circuit connected to the stylus,

SpringSupportLED
Cover
Insulating
PortionContact detection
circuitContacting
portion（SUS)

Base

StainlesssteelballStylus

wherein contact between the stylus and aworkpiece is electrically detected as a result of
formation of a closed circuit including thecontact detection circuit via the workpiece
when a contacting portion of the stylus
contacts the workpiece, andNot fulfillBwherein the contacting portion of thestylus is made of a non-magnetic material

containing tungsten carbide and a nickel binder.

9Outline of the Defendant’sPosition Detector (2)Defendant’s Position Detector(Form α)（D-Pointer (Energized type) +Standard Stylus)

Defendant’s Position Detector(Form β)(D-pointer (Energized type) +Defendant’s Stylus)

The Standard Stylus can be replacedwith the Defendant’s Stylus.

Defendant’s Stylus

10Positiondetector(Form β)

Outline of the Defendant’sPosition Detector (3)A position detector comprising:A a micro-movable stylus held in a
Battery

Mainbody

predetermined stable position in anelectrically insulated state; anda main body including a contact detention
circuit connected to the stylus,
wherein contact between the stylus and a

SpringSupportLED
Cover
Insulating
Contact portion

detection
circuitContacting
portion(Non-magneticmaterial A)

Base

StainlesssteelballStylusFulfill

workpiece is electrically detected as a result offormation of a closed circuit including thecontact detection circuit via the workpiece
when a contacting portion of the stylus

contacts the workpiece, andB

wherein the contacting portion of thestylus is made of a non-magnetic material
containing tungsten carbide and a nickel binder. 11