Seeing Patents Through an Investor's Eyes: Lessons from Buffett's Moat Theory

When a business owner writes down the budget for a patent application, few realize that this is, in fact, a capital-allocation decision.

Many companies only begin to think about patents when a product is about to launch, or when a competitor has already caught up. By then, the question is often no longer “how to build a strategy” but “whether there is still time to salvage the situation.”

Like purchasing equipment, recruiting talent, or spending on marketing, a patent strategy is essentially an act of investment in which a company deploys limited capital—the only difference being that what it buys is not a machine or an advertisement, but a period of market exclusivity. Since it is an investment, it should be examined by an investor's standard: can every dollar of budget be converted into quantifiable competitive advantage and asset value in the future?

Yet the reality is that most companies do not treat patents with an investment mindset.

Research by Professor Mark Lemley of Stanford Law School shows that the vast majority of patents are never asserted during their term—a fact that reflects not only market selection but also that a great many patents lacked real defensive value from the moment they were designed. In its report The Evolving IP Marketplace, the U.S. Federal Trade Commission (FTC) further notes that many patents, because their claims are too narrow or their specifications poorly drafted, struggle to deliver the intended exclusionary effect in actual enforcement and litigation. A study by the venture-capital research firm CB Insights found that, during financing due diligence, a considerable proportion of startups' filed patents were rated as “designable-around” or “insufficiently strong,” directly affecting valuation and fundraising outcomes.

From academic research to regulators to the venture-capital market, the conclusion points in the same direction: holding a patent certificate is not the same as owning a moat; spending a patent budget is not the same as completing an asset allocation.

This gap is precisely the problem this article sets out to address head-on. In what follows, we use the mental frameworks of Warren Buffett and Charlie Munger to unpack the roots of ineffective patent strategies, and to explain what genuinely turns a patent into a corporate asset.

1. Mistaking “Ornaments” for a Moat: Filing a Patent Is Not the Same as Building Protection

Buffett stresses that a moat must deliver a durable competitive advantage, not a fleeting showpiece.

Many companies file patents primarily “to qualify for a subsidy,” “to score points with investors,” or “to display on the company website.” There is nothing wrong with these motives in themselves; the problem is that such patents are often never designed to actually keep a competitor out.

Two outcomes are common:

• Claims too narrow—the claims are confined to something so specific that a competitor need only change a single parameter or material to design around the patent and lawfully replicate the core technology.
• Off-target coverage—the budget is spent protecting secondary, peripheral technology, while the commercially most valuable core algorithm, process, or design is left fully exposed.

A patent with no defensive breadth is like a gate standing alone on an open plain: the enemy need not break it down—they simply walk around it. For example, a patent that protects only a specific material, dimension, or parameter can be matched by a competitor who switches to an alternative material or slightly adjusts the structure to achieve the same result. Such a patent may well be granted, yet it will not necessarily stop imitation in the market.

2. Ignoring Munger's Inversion: If I Were the Infringer, What Would I Do?

Charlie Munger's famous maxim is: “Invert, always invert.”

When planning a patent strategy, most companies think about “how valuable my technology is”—a one-directional way of thinking that starts from oneself. A genuinely effective strategy should first ask:

“If I were the competitor, seeking to design around this technology at the lowest cost and the fastest speed, what path would I take?”

Which path cannot be circumvented? That position is exactly where you should dig your moat deep.

An ineffective strategy protects only “how I do it,” without blocking “what others could still do.” Many companies discover that their moat is empty only after a competitor has designed around them or an infringement warning letter has arrived.

This is why, on every application it handles, the WISECODE team does not merely analyze “how to get the patent granted fastest,” but first asks: “Which of the competitor's paths can this patent actually block?”

A good patent does not merely describe your technology; it forecloses the competitor's alternatives in advance.

3. No Margin of Safety: The Twin Blind Spots of Time and Space

One of the pillars of Buffett's investment philosophy is the margin of safety—leaving room for error. In patent strategy, this concept maps onto two dimensions:

• The geographic (spatial) margin of safety: many companies file only in Taiwan, forgetting that their primary markets lie in the United States, China, Japan, or Europe. By the time a product gains traction overseas, they find that local protection was never in place. Your technology may already have become a local “public good” that anyone may lawfully use.
• The temporal margin of safety: disclosing a technology before its priority date is the most common—and most irreversible—mistake. Before exhibiting at a trade show, before raising capital, before issuing a press release, you should first confirm that the patent strategy is in place. Once a technology enters the public domain, the door to protection closes for good.

WISECODE has long cultivated the five major filing markets of Taiwan, the United States, China, Japan, and Europe, with hands-on experience spanning more than 90 countries and jurisdictions worldwide. It is precisely this cross-border experience that allows us to help clients identify and prevent these costly lapses of time and space at the earliest stages of mapping out their markets.

4. From “Point Filings” to “Area Defense”: Building a Real Patent Moat

Turning a patent strategy from a cost outlay into a long-term asset requires an upgrade in thinking on three levels:

Level One: Multidimensional integration, not single-point filing

Patents are not the concern of the legal function alone; they must be aligned with the rhythm of R&D, the direction of the market, and the financial budget. WISECODE takes a proactive, collaborative approach: through regular interviews and R&D discussions, we uncover improvements or new applications within the client's existing technical framework that had gone unnoticed, extending a single product into a patent portfolio with real depth.

Level Two: Dynamic maintenance, not a one-and-done exercise

A moat must be dredged continually. As products iterate, the original patent from three years ago no longer corresponds to today's core product. Regular patent health checks are a necessary investment to keep the defense effective.

Level Three: A strategic map in place of scattered filings

Through patent-landscape analysis and TIPS-system guidance, WISECODE helps companies expand their protection from isolated “filing points” into a comprehensive “defensive area”—so that even a competitor who understands the logic of your technology finds the cost of designing around it high enough to give up.

From “Fortifications” to the “Balance Sheet”: The Ultimate Test of a Moat

By this point, you might ask: however deep the moat is dug, what does it actually create for the company?

The answer lies in the due-diligence rooms of financing, mergers and acquisitions, and public offerings.

In the practice of intangible asset valuation, the value of a patent is generally assessed by three methods—the cost approach, the market approach, and the one investors care about most, the income approach. The income approach answers one central question directly: how much quantifiable future income can this patent generate for the company?

In its guidance on intangible asset valuation, the World Intellectual Property Organization (WIPO) notes that the valuation of a patent portfolio depends heavily on three variables: the enforceability of the claim scope, the completeness of geographic coverage, and the degree of ongoing maintenance across the technology's life cycle. These three variables correspond precisely to the three failures discussed in the first four sections of this article—claims too narrow, geographic coverage incomplete, and a static strategy that is never updated.

In other words, an effective moat is at the same time a highly valued asset—and vice versa.

Once a patent is elevated from a “legal document” to a “financial asset,” the way one thinks about strategy shifts accordingly. Before filing, the question is no longer merely “can this case pass examination?” but “does this patent protect the company's core source of profit for the next three to five years?”, “can it be enforced in the primary markets?”, and “can it become part of a portfolio, rather than an isolated single point?”

A truly valuable patent asset is usually a mutually reinforcing web of patents—the core technology protected by a principal patent, peripheral applications covered by derivative patents, and alternative paths sealed off by blocking patents. In a valuation model, such a portfolio generates synergistic value far exceeding the sum of its individual parts.

The ultimate test of a moat is never how many patents you have, but how much those patents are worth.

In Closing: Your Moat Deserves to Be Designed with Care

Buffett and Munger never invest in mediocre companies—because they know that a company's true value is written on its balance sheet, and even more in the width of its moat.

An outstanding company, likewise, should not settle for a mediocre patent strategy. A truly valuable patent does more than earn a certificate: it keeps competitors out, supports the company's valuation, and becomes a recognizable intangible asset during market expansion, fundraising, and M&A.

The WISECODE team has always seen itself as a “fulcrum” on the client's path of innovation—not merely an agent processing application papers, but a strategic partner that helps a company convert its patent budget into measurable assets. We maintain an overall grant rate above 85%, serve more than 700 companies, and have handled over 5,500 cases.

Behind these numbers is the same question we ask of every case: can this moat really hold the enemy back? And on the balance sheet, does it really stand?