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Protractor bubble level 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • G01C-009/28
출원번호 US-0595303 (1990-10-10)
발명자 / 주소
  • Schwandt Bruce E. (33871 El Encanto Ave. Dana Point CA 92729)
인용정보 피인용 횟수 : 100  인용 특허 : 0

초록 ▼

The present invention relates to an improved leveling device for use with various tools or other objects during a construction or repair process. A bubble level is mounted along the straight edge of a semi-circular protractor. The protractor is movably connected to a base member and adapted to pivot

대표청구항 ▼

An adjustable protractor bubble level comprising: a protractor portion having angular graduations thereon; an elongate bubble level rigidly mounted to said protractor portion. a base member defining a central axis extending therethrough, said base member comprising: (a) a protractor securing portion

이 특허를 인용한 특허 (100)

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