Patents

Patents
• Intermittent Oxygen Delivery System – 1992 (5,099,836)
• Ventilator Monitor and Alarm Apparatus – 1989 (4,990,894)
• Ventilator Monitor and Alarm Apparatus – 1989 (4,803,471)
• Battery Condition Monitoring System – 1989 (4,839,597)
• Microprocessor Oxygen Monitor – 1988 (4,779,446)
• General Concentrator Design – 1987 (4,648,888)
• Oxygen Concentrator and Test Apparatus – 1986 (4,627,860)
• General Concentrator Design – 1985 (4,561,287)
• Oxygen Concentrator Oxygen Sampling System – 1985 (4,516,424)
• Circuit for Low Battery Indicator – 1980 (4,189,725)
• Lung Volume Exerciser – 1977 (4,143,872)
• Oxygen Analyzer housing – 1976 (D249,891)