When a company acquires a 'jingle' which later becomes synonymous with their brand (I.e. Intel's 5 notes), does the company acquire this on an individual patent, or does it become absorbed into an almost umbrella patent of their overall intellectual property.
I'm no expert on copyrights, and I'm not quite sure what you mean by "absorbed" ... but I'll take a stab at what I think is your actual question.
The author of a musical work has a copyright in the music he creates, unless that music was a "work for hire." If Intel hired the songwriter specifically to create the jingle, Intel owns the copyright. if not, they might buy the copyright from the songwriter.
The recording of the music is another copyright, separate from the composition. Again, Intel either owns this as a work for hire, or might buy the copyright.
The registration of the sound trademark -- protecting the association in the consumer's mind between the sound and the company -- is separate from the copyrights.
So there are individual forms of intellectual property here. I suppose you could say that, together, they make up a "portfolio."