Abstract: A memory device includes a substrate, at least a thin film superimposed on the substrate having a plurality of microholes formed in the thin film, with a first microhole having a zero depth designated as digital zero; and a second microhole having a specific depth (such as the microhole formed through the thickness of the thin film) designated as digital one; whereby upon scanning of the microholes by a focused electron beam, the physical property as responded in each microhole will be detected as a digital bit corresponding to the microhole, and the microhole, and the digital data of the memory device will be read or recorded in an easier and cost-saving way.

Abstract: An insect-killing container including: a housing for keeping a pet therein, and an electric-shock screen provided with high voltage and secured on a side wall of the housing corresponding to a ventilation window of the housing, whereby upon emitting of the pet's odor or upon visual observation of the pet in the housing, an insect such as a mosquito or a housefly will be attracted by the pet to enter the housing through the electric-shock screen to be killed by the high-voltage on the screen for efficiently eradicating insects.

Abstract: An illuminating timepiece includes: a casing having a plurality of hour numerals circumferentially disposed on a chapter ring of a dial of the casing, a plurality of stator illuminators each formed on each hour numeral on the dial, a first pointer or an hour hand rotatably mounted in the casing having at least a first rotor illuminator formed on the first pointer, a second pointer or a minute hand rotatably mounted in the casing having at least a second rotor illuminator formed on the second pointer, and an electric control device secured in the casing for subsequently switching on or off the illuminators in each pre-determined time interval for a clear read-out of time in a night or dark place.