Samsung Electronics Co., Ltd.

Yong-Wook Kim

Jang-hoon Yoo

Hyun-Wook Kim

Sung-Bin Hong

Tea-Jin Park

Byung-deok Nam

Eun-Ho Choi

Seon-jeong Lee

Tae-Youn Lee

Nam-Young Jang

Contactless cards and a corresponding anti-collision coupling method are provided, where the method includes requesting that the cards transmit their unique identifiers that each include a fixed number of bytes, receiving the unique identifiers simultaneously as byte-wise positive pulses, counting the received positive pulses, and determining that more than one card responded if the number of received positive pulses exceeds the fixed number of bytes; and where the contactless cards each include a unique identifier having a number of bytes, a receiver for receiving an anti-collision command indicative of a desired identifier byte, a comparator in signal communication with the receiver for comparing the desired identifier byte with a corresponding byte of the unique identifier, and a transmitter responsive to the comparator for transmitting the unique identifier as byte-wise positive pulses if the desired identifier byte matches the corresponding byte of the unique identifier.

Anti-collision coupling for contactless cards

A vacuum pump ejector may include ejector body and a nozzle. The ejector body may have a passageway through which fluids may flow. The passageway may have an orifice. The nozzle may inject a purging gas to the orifice. The ejector may decrease a pressure between the vacuum pump and the scrubber, so that the vacuum pump may have improved efficiency. Thus, the vacuum pump may be effectively operated.

Vacuum ejector and vacuum apparatus having the same

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Hwasung-si, South Korea

Yong-Wook Kim