230000035945 sensitivity Effects 0.000 claims description 3.238000001514 detection method Methods 0.000 claims abstract description 12.235000014676 Phragmites communis Nutrition 0.000 claims abstract description 49.210000003165 Abomasum Anatomy 0.000 claims abstract description 49.241000282326 Felis catus Species 0.000 title abstract description 50.Application granted granted Critical Publication of US4991350A publication Critical patent/US4991350A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Priority to GB8816980A priority Critical patent/GB2223257B/en Priority to GB8816980 priority Application filed by Pet Mate Ltd filed Critical Pet Mate Ltd Assigned to PET MATE LIMITED reassignment PET MATE LIMITED ASSIGNMENT OF ASSIGNORS INTEREST. Original Assignee Pet Mate Ltd Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Kirk Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US07/402,810 Inventor Christopher P.
Cat doors that open with collar pdf#
Google Patents Electromagnetically controlled cat flapĭownload PDF Info Publication number US4991350A US4991350A US07/402,810 US40281089A US4991350A US 4991350 A US4991350 A US 4991350A US 40281089 A US40281089 A US 40281089A US 4991350 A US4991350 A US 4991350A Authority US United States Prior art keywords aperture frame flap reed switches plane Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US4991350A - Electromagnetically controlled cat flap US4991350A - Electromagnetically controlled cat flap
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