Krippendorf
David Krippendorf, San Francisco, CA US
Patent application number | Description | Published |
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20130256256 | TIME LOCKABLE CONTAINER AND SYSTEM - A time-lockable storage container having a single actuation button/dial to input a time period to lock the container. | 10-03-2013 |
Frank Krippendorf, San Ramon, CA US
Patent application number | Description | Published |
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20150019021 | FIRE PREVENTION IN A NETWORK DEVICE WITH REDUNDANT POWER SUPPLIES - A device may include multiple power supplies that are cooled by a system fan. The power supplies may be cross-connected to supply power to one another and the device may monitor temperatures of the power supplies. Based on the temperatures of the power supplies, the device may determine whether any of the power supplies are likely to be on fire. The device may shut off the fan when a power supply is determined to be likely to be on fire. | 01-15-2015 |
Tido Krippendorf, Erkelenz DE
Patent application number | Description | Published |
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20080272911 | Hazard Indicator with LED - A hazard indicator including a power-saving control circuit having a transistor with a collector connected via a resistor to the output of the signal processing circuit. In operation, the transistor delivers the clocked control signal for the semiconductor switch as a function of the current-proportional voltage applied to the base of the transistor. | 11-06-2008 |
20120206257 | ALARM SYSTEM - An alarm system control center has subscribers connected to it by a two-wire line. The subscribers receive via the two-wire line both a power supply voltage and communication messages in the form of pulse trains impressed on the power supply voltage as voltage modulation. Each subscriber includes a constant current circuit which is connected to the two-wire line and which is used to charge a storage capacitor with a voltage regulator coupled to it. In order to reduce communication errors, a transformer is provided to reduce power supply voltage to an internal value which is lower than the than the power supply voltage at least by the voltage swing of the pulses of the communication messages on the two-wire line. | 08-16-2012 |