Recreational compass
Patent 4438568 Issued on March 27, 1984. Estimated Expiration Date: 
November 9, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 9, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1571697 2019411 2111829 2136970 2331747 2358589 3184854 3248793 Wrist compass and transit Vessel adaptable to the expansion and/or contraction of fluid therein Patent #: 4236316 InventorsAssigneeApplicationNo. 06/319208 filed on 11/09/1981US Classes:33/348, With viewing aid (i.e., illuminator or illumination director)33/272, With magnetic compass33/355R, Magnetic field responsive33/364, Liquid buoyed magnetic needleD10/68Compass (8)ExaminersPrimary: Martin, William D. Jr.Attorney, Agent or FirmInternational ClassesG01C 17/00 (20060101)G01C 17/04 (20060101) AbstractA recreational or sportman's compass is comprised of an inner vial including a compass needle which together with an azimuth ring is resiliently mounted within a housing so as to be rotatable together or independently of one another. The vial is assembled together with the outer azimuth ring and retainer in such a way as to permit assembly of the parts into snug-fitting concentric relation to the housing without the necessity of positively fastening or affixing the vial to the housing. | |
