Obviousness

Obviousness Analysis of US Patent 12240457 under 35 U.S.C. § 103

This analysis assesses the obviousness of claims 1 and 12 of US Patent 12240457B1 by combining elements from the cited prior art references. A person having ordinary skill in the art (PHOSITA) in vehicle control systems would have been motivated to combine these references to achieve the claimed invention.

Independent Claims

The two independent claims, Claim 1 and Claim 12, are substantially similar. For the purpose of this obviousness analysis, we will focus on the elements common to both:

• A method of operating a motor vehicle having a steering control and a drive system/controller operable to selectably drive wheels in a drive mode and in a reverse mode.
• Step 1: The drive system/controller monitoring the steering control while driving in a first direction.
• Step 2: The drive system/controller offering a driver a change from one of the drive mode and reverse mode to the other based on the steering control.
• Step 3: The drive system/controller changing from the one of the drive mode and reverse mode to the other in response to an approval by the driver of the offered change.

Combination of Prior Art References

We propose the combination of:

1. US9085321B2 (Mando Corporation): "Unparking control system and unparking control method using the same." This patent describes a system that performs automatic unparking control, inherently involving monitoring vehicle conditions and executing gear changes.
2. Prior Art Acknowledged in US12240457B1's Background: The background section of US12240457B1 explicitly describes an existing system that offers a driver a proposed direction (e.g., when initially proceeding from a parked condition) and accepts a non-directional input for driver confirmation.

Obviousness Argument

Step 1: Monitoring steering control while driving in a first direction.
US9085321B2 (Mando) teaches an "unparking control system and unparking control method" that involves "performing automatic unparking control based on the unparking condition". This automatic control requires the system to monitor various vehicle parameters, including steering angle and vehicle movement (e.g., "moving the vehicle backward or forward while controlling the steering angle of the vehicle wheels"). Therefore, Mando clearly teaches the drive system/controller monitoring the steering control while driving in a first direction (e.g., reversing out of a parking spot).

Step 2: Offering a driver a change from one of the drive mode and reverse mode to the other based on the steering control.
Mando's unparking system inherently determines when a gear change is necessary (e.g., from reverse to drive to complete the unparking maneuver), based on the calculated optimal path, which is driven by steering angle and vehicle position. A PHOSITA would understand that the algorithms within Mando's system (or similar parking assist systems like US20130110342A1 by Volkswagen) use steering angle patterns and other vehicle parameters to identify the appropriate moment for a gear shift to facilitate the maneuver. The concept of "offering" this shift to the driver, rather than performing it automatically, would be a straightforward design choice to ensure driver oversight and safety.

Step 3: Changing modes in response to an approval by the driver of the offered change.
The background of US12240457B1 explicitly details prior art where a vehicle system "may then offer the driver that proposed direction, and the driver then for safety reasons indicates (such as by a tap on the brake) that the proposed direction is safe and correct.". It further clarifies that "the driver confirmation of the direction is provided by a control input that conveys no direction information and is the same input regardless of direction proposed.". This directly teaches the concept of offering a direction change and accepting a non-directional driver approval. Examples of such non-directional approval, explicitly mentioned in the patent's description, include "a brake tap sequence 140 or other non-direction indicating signal such as a button click, voice command, or visually-detected gesture.".

Motivation to Combine

A PHOSITA would be motivated to combine the teachings of Mando (or similar unparking assist systems) with the known "offer-and-approve" mechanism for gear selection for the following reasons:

1. Enhanced Convenience and Reduced Distraction: Unparking maneuvers often involve multiple gear shifts and steering adjustments in dynamic environments (e.g., parking lots with other vehicles and pedestrians). The patent itself notes that "The screen swipe [for gear selection] may be a distraction, require visual observation to reach a small area, and may be a non-intuitive direction for some users." By leveraging the gear change determination logic of an unparking system like Mando's and presenting it as an offer requiring only a non-directional approval (as described in the patent's background), the driver's task is simplified. This reduces cognitive load and visual distraction, allowing the driver to focus on the surroundings during a critical maneuver.
2. Improved Safety: Integrating a clear offer with driver confirmation (even non-directional) ensures that the driver retains ultimate control and can override or approve the system's suggestion, which is crucial for safety. The patent explicitly states, "Errors of enacted shifts are intolerable as they may cause accidents, so approval preferably needs to be indicated before an offered shift is enacted." Applying the known non-directional approval method to the gear changes calculated by an unparking system provides this safety mechanism while still offering convenience.
3. Efficiency: The patent highlights that "Auto-shifting may reduce exposer to traffic and enable safe unparking with smaller traffic gaps by reducing the D-E time period that would be taken enacting a manual shift, with the attendant distraction." This demonstrates a clear motivation for combining existing automated shift determination with streamlined, non-directional driver approval to make unparking more efficient.

Therefore, it would have been obvious for a PHOSITA to combine an unparking control system that determines optimal gear shifts based on steering (as taught by Mando or Volkswagen) with the well-known mechanism of offering a proposed gear direction and accepting a non-directional driver approval (as acknowledged in the patent's own background), to create a more convenient, safer, and efficient vehicle operation during unparking maneuvers.

The dependent claims, which further specify criteria such as patterns/sequences of steering movements (claims 2, 3, 13, 14), specific approval inputs like brake actuation (claims 4, 5, 11, 15, 16, 22), steering angle thresholds (claims 6, 17), velocity thresholds (claims 7, 18), and distance traveled (claims 8, 19), describe parameters and methods that are commonly employed in sophisticated vehicle control and driver assistance systems and would be readily apparent to a PHOSITA implementing the combination described above. These are merely conventional implementations of the broader concept.