Search Tool 先行技術などの自動検索

ちょっと変わった特許検索サイトを見つけました。
入力した特許番号またはキーワードをもとに、先行技術検索、無効特許検索、侵害特許検索を自動的にしてくれます。
たとえば、侵害特許検索の場合、自分の所有する特許番号を入力し、Infringing uses Analysisボタンを押すと、入力した特許の内容に基づいてこの特許の後願＆権利侵害していそうな特許リストを出力します。さらに、特許リストを簡易抄録集の形で表示することができ、この抄録にはespacenetへのリンクが埋め込まれます。
ためしにUS5492183に関し、実際に無効特許検索をして関連抄録を抽出しました。以下にその出力の一部を掲載します。 なお、精度については検証していないのでよくわかりません。だれか、試されたならぜひ結果をレポートしてください。簡易マニュアルはここにあります。 DATAソースはDOCDBだそうですので申し分ないと思います（データ更新インターバルが若干気になりますが・・・）。

なお、このサイトが完全無料なのかどうかはわかりません。私はちょっと試して見た程度なのですがユーザー登録も何も要求されませんでした。

US5195598 DEVALL DONALD L (US)DEVALL; DONALD L 19930323 EPC: E21B3/02 IPC: E21C7/02 IPC: E21B3/00 IPC: E21B3/02 PDF file full text invalidity search patent family:US

Drill head assembly An improved rotary drill head assembly including a drill head cover having an upper portion, a rotatable drill retaining socket having an outer surface and a support member having an upper portion. The socket extends above the support member. A flinger attached to the upper portion of the support member and having an axial passage extending therethrough, a top cap having an axial passage extending therethrough. An arrangement for attaching the flinger to the top cap including a pin received by one of the flinger and the top cap. A top plate attached to the top cap. The top plate includes an arrangement to protect the pin from the outside environment and to hold the pin in place against axial movement. A sealing arrangement between the upper portion of the drill head cover and the flinger.

GB2265647 COMPAIR HOLMAN LTD (GB)* COMPAIR HOLMAN LIMITED 19931006 EPC: E21B3/02; E21B19/16 IPC: E21B3/02; E21B19/16 IPC: E21B3/00; E21B19/00 IPC: E21B3/02; E21B19/16 PDF file full text invalidity search patent family:GB

A drive coupling device for a longitudinally displaceable rotatable drive member A drive coupling device for a longitudinally displaceable rotatable drive member (14) having screw threaded connector means for connecting the member (14) to a correspondingly threaded part (11a) of a driven member (11) comprises a longitudinally slidable collar (37) surrounding the driven member (14) and fixed for rotation therewith, the collar being displaceable between a retracted position as shown in which it leaves the said screw threaded portion exposed, and an advanced position in which ft at least partially surrounds the said screw threaded portion (14b) for cooperative engagement with a driven member (11) screw threadedly engaged on the drive member (14). This allows a threaded coupling 11b, 12a to be unscrewed by the drive member without unscrewing the joint between drive member 14 and driven member 11.

JP4049396 INOUE HISAOINOUE HISAO 19920218 IPC: E21B3/02; E21B7/00 IPC: E21B3/00; E21B7/00 IPC: E21B3/02; E21B7/00 PDF file full text invalidity search patent family:JP

CONCENTRIC BIAXIAL AUGER MACHINE PURPOSE:To miniaturize a machine and reduce cost by fitting an external casing with a bit at the external main shaft of an auger machine and an auger screw with a bit at the internal main shaft respectively, and rotating the two to the opposite directions with each other by one driving motor. CONSTITUTION:An external casing 13 with a front edge bit is fitted at the external main shaft 5 of an auger machine. Next, an auger screw 11 with a front edge bit is fitted at the internal main shaft 6. And the external main shaft 5 and the internal main shaft 6 are rotated in this state to both normal and reversal directions by the driving motor 3 to strike piles while moving up and down the main body case 1 and the internal main shaft 6 by a lifting means 12 along the guide of the base body.