niftymitch writes "And I quote from US patent 7,958,388
United States Patent 7,958,388
Bullen , et al. June 7, 2011
"The above description of the preferred embodiments has been given by way of example. From the disclosure given, those skilled in the art shall understand the invention and its advantages, but will also find apparent various changes and modifications that can be made to the methods and structures disclosed. We seek therefore to cover all such changes and modifications as fall within the spirit and scope of the invention, as defined by the appended claims and equivalents thereof. Thus, it is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims."
Which I take to claim that anything a workman like programmer discovers as missing is included even if they have not thought of it yet.