CA1306386CCA000542329ACA542329ACA1306386CCA 1306386 CCA1306386 CCA 1306386CCA 000542329 ACA000542329 ACA 000542329ACA 542329 ACA542329 ACA 542329ACA 1306386 CCA1306386 CCA 1306386C
Authority
CA
Canada
Prior art keywords
extending
protector
flange
vent passages
slit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by IndividualfiledCriticalIndividual
Priority claimed from US07/242,174external-prioritypatent/US4872690A/en
Application grantedgrantedCritical
Publication of CA1306386CpublicationCriticalpatent/CA1306386C/fr