Sommerville Design & Mfg. Inc. v. J. Philip Humfrey International Inc.

Decision 1: Anchor the defence on the knowledge element of the inducement tort — not on whether Sommerville actually breached

The tort of inducing breach of contract has three elements: (a) a breach by the contracting party; (b) knowledge of the contract by the inducer; and (c) intentional inducement. The natural defensive instinct for Black & Decker would be to engage on element (a) — argue that Sommerville did not in fact breach its contract with International. That route led directly into a complex factual question turning on the precise scope of the 1983 agreement, the impact of the 1991 trademark transfer, and the meaning of “proprietary rights” in section 11 of the agreement. It is a contested merits question and is exactly the kind of fight Black & Decker had no business being in.

We did not anchor there. We anchored on element (b): Black & Decker simply did not know about the contractual relationship between Sommerville and International. Black & Decker had no prior dealings with International. There was no discussion of proprietary rights between Sommerville and Black & Decker. Philip Humfrey himself never attempted to contact Black & Decker. This made the defence a purely factual question Black & Decker could prove from its own records. Justice Lack adopted this framing in para. 55: “There is no evidence that Black & Decker had any knowledge of the nature of the contractual relationship between International and Sommerville. It had no prior relationship with either of them.”

Decision 2: Build a no-breach argument as a parallel ground — defence in depth

With the knowledge argument as the lead, we built the no-breach argument in parallel. If somehow the court found that Black & Decker should have known about the contract, there still had to be a breach by Sommerville to convert that knowledge into liability. We supported the position that Sommerville was free to design a scroll saw for Black & Decker independently of International — different product, no use of the “Excalibur” name, the parallel link mechanism patented in 1870 was in the public domain, and no proprietary rights in the relevant components.

Justice Lack adopted this framing too: “Sommerville was not in breach of the contract. Consequently there was no inducement by Black & Decker to Sommerville to breach the contract, even if Black & Decker had been aware of it” (para. 55). Defence in depth: knowledge argument plus no-breach argument. Either alone defeats inducement.

Decision 3: On vague claims (loss of business reputation, unfair competition), force specifics rather than engaging on the merits

The natural temptation when faced with vague claims for substantial damages (punitive, aggravated, exemplary, loss of business reputation) is to engage on the merits — demonstrate affirmatively that no harm was caused. We did not. Instead, we forced International to either plead and prove specific facts or accept dismissal for failure to plead the elements of the cause of action.

International produced no facts to support either claim. Justice Lack disposed of the loss-of-business-reputation claim in a single paragraph (para. 53): “Although International claims damages against Black & Decker for loss of business reputation it failed to plead or prove any facts in support of such a claim. It is frivolous and without merit.” On unfair competition the court said the same (para. 40): “[I]t failed to plead or prove any facts in support of the claim. The claim is frivolous and without merit.” By not engaging on these claims substantively, we kept the defence narrow and let the absence of facts do the disposing.

1. For corporate defendants drawn into a counterclaim, anchor on the element you can prove from your own records. The tort of inducing breach of contract has three elements. Knowledge is the easiest to disprove if your client genuinely had none — your records, your communications, your prior relationship history will show it. Engaging on whether the underlying breach occurred pulls you into someone else’s contractual mess, and that mess will dominate the trial.

2. Build defence in depth — but pick the lead anchor carefully. Two grounds, where either alone wins, is materially safer than one. But the lead ground should be the one most likely to result in the cleanest, fastest disposition. For Black & Decker, “we didn’t know” was cleaner and faster than “they didn’t breach” — even though both were true. Lead with what is purely factual to your client; keep the contested merits as a fall-back.

3. Vague punitive / aggravated / exemplary damages claims and “loss of business reputation” can often be defeated by demanding specifics rather than engaging on the merits. A claim that asserts substantial damages without specific supporting facts is structurally weak. Forcing the plaintiff to plead specifics — or accept dismissal for failure to plead the elements of the cause of action — is more efficient than litigating the underlying merits. The court will dismiss frivolous claims at trial if the record genuinely lacks supporting facts.