The King v. Smith Incubator Co. Et al.

The King v. Smith Incubator Co. Et al.

The patent is invalid because Smith's method and apparatus claims, as worded, were anticipated by prior public use and knowledge (Milo Hastings' Muskogee 1912 operations) and are overbroad, lacking a sufficient novel inventive step beyond the known principle of forced air circulation; the apparatus claims likewise disclose only mechanical details and are anticipated.

Citation
[1937] SCR 238
Parties
Appellant/plaintiff: His Majesty The King (on the information of the Attorney‑General of Canada); Respondent/defendant: The Smith Incubator Company; Respondent/defendant: The Buckeye Incubator Company
Court
Supreme Court of Canada
Jurisdiction
Canada
Judgment Date
19 March 1937
Procedural Posture
Patent Invalidation (impeachment Under the Patent Act) / Appeal — Supreme Court of Canada on Appeal From the Exchequer Court of Canada
Outcome
Appeal allowed.
Legal Topics
Prior Public Use, Anticipation, Claim Construction, Novelty/inventive Step, Method Versus Apparatus Claims
Source Language
English
Intellectual Property Patent Law Prior Public Use Anticipation Claim Construction Novelty/inventive Step Method Versus Apparatus Claims

Case Brief

Summary, issues, holding and outcome

More case intelligence is available

Unlock the full research layer for this judgment.

Full judgment text Legal principles 4 Authorities cited 9 Party arguments 2 Amounts and remedies 3
Sign in to unlock

Parties

His Majesty The King (on the information of the Attorney‑General of Canada)

Appellant/plaintiff

The Smith Incubator Company

Respondent/defendant

The Buckeye Incubator Company

Respondent/defendant

Procedural Posture

Patent Invalidation (impeachment Under the Patent Act) / Appeal — Supreme Court of Canada on Appeal From the Exchequer Court of Canada

Legal Issues

  1. 1 Whether the patent claims disclose patentable invention beyond the known principle of air circulation
  2. 2 Whether prior public use by Milo Hastings (Muskogee 1912) anticipated the method and apparatus claims
  3. 3 Whether the claims are overbroad and read on prior art/user

Ratio Decidendi

The patent is invalid because Smith's method and apparatus claims, as worded, were anticipated by prior public use and knowledge (Milo Hastings' Muskogee 1912 operations) and are overbroad, lacking a sufficient novel inventive step beyond the known principle of forced air circulation; the apparatus claims likewise disclose only mechanical details and are anticipated.

Court Disposition

Appeal allowed.

Orders

  • Declaration that Canadian letters patent No. 217,777 (issued April 18, 1922 to Samuel B. Smith) are invalid and void and are cancelled and set aside.
  • Information of the Attorney‑General of Canada maintained.