Question 4 of 7: Protecting an Idea

Question 4: Protecting an Idea (15 marks)

Question text not reproduced: the examination questions are © Engineers and Geoscientists BC. Open the official past paper (linked at the top of this page) to read the question, then follow the worked solution below.

Answered in the Canadian statutory frame, administered by the Canadian Intellectual Property Office (CIPO) under the Patent Act, Industrial Design Act, Trademarks Act and Copyright Act. Part D is read as applying to the five options listed in Part C, which is plainly what is intended.

Part A — Why protecting intellectual property matters (3 marks)

The commercial reason is that development is a sunk cost and imitation is not. A competitor who copies a successful product avoids the development spend, the failed concepts and the market risk, and can therefore undercut the originator on a product the originator paid to create. Exclusivity restores the ability to price above marginal cost for long enough to recover that investment; without it, the rational level of investment in new products falls.

Three further reasons matter as much in practice. Freedom to operate: filing, or publishing defensively, prevents a competitor from patenting the same idea and excluding you from your own product — and since Canada moved to first-to-file in 1989, the date of filing rather than the date of invention decides who owns it. Asset value: registered rights are property that can be valued, licensed, used as security, and pointed at by an investor; for an early-stage company the portfolio is often the largest item on the balance sheet. Leverage: a portfolio deters litigation, supports cross-licensing, and gives a small company something to trade with a large one.

Whether the protection is worth its cost is a question with a numerical answer, and it is the same calculation that decides Part C's choice between patenting and secrecy.

Given. An invention expected to earn incremental profit $R$ = CAD 150,000 per year. Discount rate $i = 9$ per cent. A patent gives a 20-year term from filing, of which about 3.5 years is consumed by prosecution, leaving $N = 16.5$ years of enforceable exclusivity. Filing, prosecution and maintenance over that life cost about CAD 60,000 in present value. A trade secret has no term but leaks at an annual hazard rate $\lambda$, taken as 0.15 for a product that must be sold and can be reverse-engineered.

Find. The present value of each route, and the leak hazard at which they are equally attractive.

Approach. Value the patent as a finite annuity over its enforceable life and the secret as a perpetuity discounted at the sum of the interest rate and the leak hazard, then equate.

1. Value the patent route. A level annuity of $R$ over $N$ years at rate $i$ has present value $$PV_{\text{patent}}=R\,\frac{1-(1+i)^{-N}}{i}=150{,}000\times\frac{1-(1.09)^{-16.5}}{0.09}=150{,}000\times 8.4306=\boxed{1{,}264{,}588}$$ in CAD, or about CAD 1.205 million net of the CAD 60,000 of filing and maintenance cost.
2. Value the trade-secret route. If the secret survives each year with hazard $\lambda$, the expected cash flow at time $t$ is $R e^{-\lambda t}$ and, discounted continuously, the perpetuity collapses to $$PV_{\text{secret}}=\frac{R}{i+\lambda}=\frac{150{,}000}{0.09+0.15}=\boxed{625{,}000}$$ in CAD. The patent is worth roughly twice the secret at this leak rate.
3. Find the indifference hazard. Setting the two equal and solving for $\lambda$, $$\lambda^{*}=\frac{R}{PV_{\text{patent}}}-i=\frac{150{,}000}{1{,}264{,}588}-0.09=\boxed{0.0286\ \text{per year}}$$ which corresponds to a mean secret life of $1/\lambda^{*}=34.9$ years. The secret is only the better route if the information can realistically be kept for about thirty-five years — possible for a process locked inside a plant, and not possible for anything a customer can buy and take apart. That is the Coca-Cola argument stated as a number.

Part B — The role of a nondisclosure agreement (2 marks)

A nondisclosure agreement creates a contractual duty of confidence so that a disclosure made to a supplier, a prospective investor, a test house or a potential licensee is not a public disclosure. This matters for two distinct reasons. First, novelty: a public disclosure destroys patentability in most of the world immediately, and although Canada and the United States allow a twelve-month grace period for the inventor's own disclosure, Europe, China and Japan do not, so an unprotected conversation can forfeit the international rights before an application is ever drafted. Second, trade secrecy: a trade secret is only protectable if reasonable steps were taken to keep it secret, and the agreement is the primary evidence that such steps were taken.

A competent agreement defines what counts as confidential information and how it is marked, the permitted purpose, the term of the obligation, the treatment of residual knowledge in the recipient's employees' heads, the obligation to return or destroy materials, and who owns anything created during the discussions. It should be mutual where both sides will disclose. What it does not do is equally important: it does not create ownership, it does not survive an accidental public disclosure, and it is worth exactly as much as the counterparty's willingness to be sued, which is why it is a supplement to filing rather than a substitute for it.

Parts C and D — Five protection options and an example product for each (5 + 5 marks)

The instruments are complementary rather than alternative, and a single product routinely uses several: the thermostat above is a patented control algorithm, a registered industrial design for its faceplate, a trade-marked brand, copyright in its firmware, and a trade secret in the calibration procedure. The design decision is not which one to choose but which layer protects which part of the value, and the calculation in Part A is what settles the one genuine either-or — patent or secret — because filing publishes the invention and forecloses secrecy permanently.