A single product frequently carries more than one form of protection at once. The name is a trademark. The code and the interface are subject to copyright. The method behind it may be held as a trade secret. The documentation, the data and the design each sit somewhere of their own. Managed together these reinforce one another; managed separately they drift, and they sometimes work against each other.
The conflicts are real. Protection kept as a trade secret is defeated by publication, so a decision to disclose in one place forecloses an option in another. Rights held in different names — a founder, a predecessor entity, an acquired company — do not consolidate on their own. Registrations lapse quietly when nobody is tracking the maintenance dates.
Managing a stacked portfolio means keeping an accurate picture of what exists, in what form, held by whom, and renewable when; deciding deliberately which layer carries the weight for each asset; and pruning what no longer earns its cost.
This is the operational half of IP strategy. Where strategy decides what is worth protecting, portfolio management is the work of keeping those decisions true over time.
That is the usual starting point. An accurate inventory is the prerequisite for every decision that follows, and most portfolios contain both gaps and things no longer worth paying for.