Judge Jones Construes Claims in Toyota Hybrid Case

In a case that features Hollywood's David-versus-Goliath story of inventorship (for example see this link), independent inventor Conrad Gardner is suing Toyota for patent infringement of his U.S. Patent No. 7,290,627. The ‘627 Patent covers hybrid vehicle technology for automobiles. Specifically, the patent relates to the use of an internal combustion engine and a separate electric motor for powering a hybrid vehicle. While Mr. Gardner's patent has a priority date earlier than Toyota's first patent in this area, he has had difficulties in this case. The latest came in terms of claim construction, while it is not clear of the implications.

Claim one of the '627 patent is copied below:

1. A controller of a hybrid electric vehicle having an engine (22)
and a motor (12) for controlling driving of the engine (22) and the motor
12, comprising: a battery (58) for supplying electric power to the motor (12); motor-generated driving force transfer means (14) for transferring the driving force generated by the motor (12) to wheels (18); a power generator (78) driven by the engine (22) to supply generated electric power to the battery (58); engine-generated driving force transfer means (75) for transferring the driving force generated by the engine (22) to the wheels (28); means for detecting a vehicle running state (44); and control means (30) for controlling whether to transfer a driving force generated by an engine (22) to a power generator (78) or wheels (28)in accordance with a vehicle running state, wherein the control means (30) transfers the driving force generated by the engine (22) to wheels (28) when said running state is more than a predetermined value, transfers the driving force generated by the engine (22) to the power generator (78) when said running state is less than a predetermined value.

Judge Jones recently construed this claim and others. In particular, there was a lot to say about whether certain terms should be construed as means-plus-funtion under Section 112 paragraph 6.

From Judge Jones' order:


Mr. Gardner’s proposed construction is confusing, because he both contends that this claim does not have a means-plus-function limitation and also directs the court to the drawings as evidence to support the “well-understood meaning.” Again, Mr. Gardner has unsuccessfully attempted to rebut the means-plus-function presumption. In order to rebut the presumption, the claim language itself would have to define the structure that performs the stated function. Mr. Gardner has not pointed to any language in the claim itself that describes definite structure, and indeed relies on the drawings in order to construct the term. Thus, the court concludes that this is a means plus-function limitation because no specific structure is identified.