Title
Supreme Court
Yao Sr. vs. People
Case
G.R. No. 168306
Decision Date
Jun 19, 2007
MASAGANA officers challenged search warrants for alleged trademark infringement; Supreme Court upheld warrants, citing probable cause and proper issuance.

Case Summary (G.R. No. 168306)

Petitioners

William C. Yao, Sr., Luisa C. Yao, Richard C. Yao, William C. Yao, Jr., and Roger C. Yao, incorporators and officers of MASAGANA, challenged the issuance and execution of Search Warrants No. 2‐2003 and No. 3‐2003 and moved for the return of seized equipment.

Respondents

The People of the Philippines, Petron Corporation (owner of the GASUL trademarks) and Pilipinas Shell Petroleum Corporation (authorized user of the SHELLANE marks), alleged unauthorized use of their registered trademarks in violation of Republic Act No. 8293.

Key Dates

• Affidavits and applications filed: April 3, 2003
• Search Warrants issued by RTC, Cavite City: June 5, 2003
• RTC denied motions to quash and for return: June 5, 2003; reconsideration denied July 21, 2003
• CA affirmed RTC: Decision September 30, 2004; resolution June 1, 2005
• SC Decision: June 19, 2007

Applicable Law

1987 Philippine Constitution, Article III, Section 2; Rule 126, Sections 4–5, Revised Rules on Criminal Procedure; Section 155 and Section 170, Republic Act No. 8293 (Intellectual Property Code).

Factual Background

MASAGANA operated an LPG refilling plant in Trece Martires, Cavite. Petron owned the GASUL marks; Shell International (through Pilipinas Shell) owned the SHELLANE marks. Neither authorized MASAGANA to refill or distribute their cylinders.

Applications for Search Warrants and Affidavits

On April 3, 2003, Oblanca, with Alajar’s corroboration, filed two applications alleging probable cause under Sections 155 and 170 of RA 8293. They reviewed trademark registrations, verified non‐authorization, conducted two test‐buys using aliases, observed refilling in their presence, noted absence of valve seals, and documented deliveries of branded cylinders.

Issuance and Contents of Search Warrants

Judge Melchor Q.C. Sadang found probable cause and issued two warrants commanding search of the MASAGANA compound and seizure of: branded LPG cylinders; refilling machinery (compressors, pumps, hoses, scales, seals); accounting records; and delivery vehicles bearing specific plate numbers.

Execution of Warrants and Seized Items

NBI operatives executed the warrants, seizing dozens of filled and empty GASUL and SHELLANE cylinders (11 kg and 50 kg), a motor compressor, an LPG refilling machine, and related documents and vehicles.

Motions to Quash and for Return of Property

Petitioners moved to quash the warrants, arguing lack of probable cause, authority, and particularity, and labeling them general warrants. MASAGANA, as third‐party claimant, sought return of equipment used in its legitimate business.

RTC Orders and Rationale

On June 5, 2003, the RTC denied both motions. It held that: (1) affidavits and evidence established probable cause; (2) Oblanca and Alajar had personal knowledge from surveillance and test‐buys; (3) the compound was sufficiently described; (4) items to be seized were particularized; and (5) MASAGANA could not claim separate ownership, as petitioners used the corporation to commit infringement.

Appeal and CA Decision

Under Rule 65, petitioners sought certiorari relief at the Court of Appeals. On September 30, 2004, the CA affirmed the RTC, finding no grave abuse of discretion in the issuance or execution of the warrants; the CA denied petitioners’ motion for reconsideration on June 1, 2005.

Petitioners’ Grounds before the Supreme Court

Petitioners challenged: (I) existence of probable cause; (II) authority of Oblanca to apply for the warrants; (III) particularity of the place description; (IV) particularity of items to be seized; and (V) MASAGANA’s right as third‐party claimant to recover seized equipment.

Issue I – Probable Cause Standard

Probable cause for a search warrant under the 1987 Constitution and Rule 126 requires facts or circumstances leading a prudent person to believe an offense was committed and evidence is in the place to be searched. Affidavits must be supported by personal knowledge, not mere hearsay.

Issue I – Evidence of Personal Knowledge

Oblanca and Alajar personally reviewed trademark registrations, verified non‐authorization, conducted undercover test‐buys, witnessed refilling, and observed delivery operations. Documentary and photographic evidence corroborated their accounts. The Court held these facts sufficient to establish probable cause without applying the stricter standards of proof used at trial.

Issue II – Authority to Apply for Warrants

Petitioners argued that Oblanca lacked authority as he was not assigned to the Intellectual Property Division. The Court found no rule requiring a specific division assignment; the agent’s affidavit showed he was duly assigned following a letter‐complaint. There was no statutory obligation to present the originating complaint or board resolutions.

Issue III – Particularity of Place to be Searched

Constitutional and rule requirements demand the place be described with sufficient particularity so officers can identify it. The warrants specified the MASAGANA compound at Governor’s Drive, Barangay Lapidario, Tre

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