We have made sensors for detecting tools in the PCB industry. Then there were the sensor systems for military ammunition testing (from 22 caliber to 105mm). The cupboard had low pressure leak detection systems for automotive heater cores and radiators. The air conditioning field was prolific with everything from control algorithms to oil breakdown detection sensors.
We still have some that we have not commercialized. We are examining what is the next direction. RFID readers for everyone, Off the Grid products for cell phone isolaltion, non-lethal products for perpetrator control. Which will it be and when?