Invalidity dossier
US 9073531
Motor control device and vehicle brake hydraulic pressure control apparatus
Current assignee: Autoliv Nissin Brake Systems Japan Co Ltd
Added 9/23/2026, 11:03:56 PM
Active provider: DeepSeek · deepseek-flash
Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview — US 9,073,531 B2
Title: Motor control device and vehicle brake hydraulic pressure control apparatus
Patent number / application: US 9,073,531 B2; application US 14/016,956; publication US 2014/0060038 A1
Inventor: Nobuyuki Nomura
Assignee: Original assignee Nissin Kogyo Co., Ltd.; current assignee listed as Autoliv Nissin Brake Systems Japan Co., Ltd. (per the source's assignee listing)
Key dates: Priority date 2012-09-05; filing date 2013-09-03; publication date 2015-07-07; anticipated expiration 2033-09-03. Legal status shown as Active.
Purpose: The invention relates to a motor control device that controls a motor by monitoring voltage between the motor's terminals, and to a vehicle brake hydraulic pressure control apparatus incorporating it. Motor rotation state is detected to control motor revolutions and/or detect motor abnormality, and rotation state can be determined from the motor's counter electromotive force obtained by detecting the terminal voltage. The stated aim is to make it possible to easily detect motor terminal voltage irrespective of the motor's driving frequency. One described benefit: even if driving frequency is increased (reducing operating noise), terminal voltage can still be detected during an off period.
Plain-language scope: A driving controller performs on/off control of the motor at a first period. Separately, an off control is performed with a second period longer than the first, so terminal voltage can be sampled during an off time. Off control is initiated a predetermined time before the voltage acquisition timing, so the terminal voltage has stabilized when acquired, allowing high-accuracy acquisition. The vehicle example is a vehicle behavior control apparatus (100) with a hydraulic pressure unit (10), controller (20), sensors (wheel speed, steering angle, lateral acceleration, yaw rate), and a common motor (9) driving pumps.
Source: https://patents.google.com/patent/US9073531/en
What the excerpt does not establish: It does not show the full claims, complete description, drawings' contents, or the specific numerical values/algorithms, and omits much of the hydraulic circuit description. Classifications, legal status, and assignee entries are noted as assumptions in the source.
Generated 10/1/2026, 9:32:54 PM
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Litigation summary
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Proceedings on file (0)
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PTAB challenges
AIA trial proceedings at the USPTO Patent Trial and Appeal Board — IPR, PGR, and CBM. Petitioners, judge panels, claim-level invalidation outcomes from Final Written Decisions, and Federal Circuit appeals. The single most important defensive datapoint after litigation history.
Assignment history
Inventors, original assignee, and the chain of ownership recorded with the USPTO — including the correspondent attorney who recorded each assignment, since shell-LLC chains often share one repeat-player attorney even when the entity names look unrelated. Surfaces NPE / patent-troll patterns: shell-entity transfers, known asserters in the chain, repeat correspondent fingerprints, pre-litigation assignments, and bankruptcy fire-sales.
Prior art
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Obviousness
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Extensions
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Derivative works
Defensive disclosure: derivative variations of each claim designed to render future incremental improvements obvious or non-novel.