Intrusion Detection Patents (Class 340/541)
- Portable (Class 340/546)
- Specified sensor (Class 340/545.2)
- Magnetic sensor (Class 340/547)
- Plug or cord tension sensor (Class 340/548)
- Rotatable sensor (Class 340/549)
- Sensing of electromagnetic energy (e.g., light, infrared, or microwave) (Class 340/545.3)
- Sensing of electrical parameter (e.g., piezoelectricity or capacitance) (Class 340/545.4)
- Inertia-type sensor (e.g., mercury or pendulum switch) (Class 340/545.5)
- Door, cover, or lid for self-contained article (e.g., refrigerator, mailbox, drawer, cabinet, or box) (Class 340/545.6)
- Specified door or window portion (e.g., doorknob) (Class 340/545.7)
- Specified door or window attachment (e.g., shade or blind) (Class 340/545.8)
- Plural doors or windows (Class 340/545.9)