https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=85335&pn=5,432,706 Multimeter Having Min/max Time Stamp Patentees: Glen A. Meldrum - Mountlake Terrace, Snohomish County WA , Alan W. McRobert - Kirkland, King Count WA , Robert M. Grennberg - Marysville, Snohomish County WA Granted:1995-07-11
Manufactured by John Fluke Mfg. Co. - Everett, Snohomish County WA
Assigned to John Fluke Mfg. Co. - Everett, Snohomish County WA

This is a continuation of application Ser. No. 07/666,354 filed Mar. 8, 1991 and now abandoned. Abstract: A min/max time stamp for a multimeter provides display of minimum and maximum measured values recorded since enabling a min/max function. The minimum and maximum values, as well as a present value, may be displayed, together with the relative or absolute time at which the measured minimum or maximum occurred. An alert signal is generated to indicate a new maximum or a new minimum measurement. Claim: A measurement device comprising: measurement means for acquiring a signal and for producing a first digital measurement value representative of the signal; microprocessor means receiving said first measurement value from an output of said measurement means, said microprocessor means operating according to a program adapted to compare said first value with a stored second value representative of a maximum and to replace said stored second value with said first value if said first value represents a maximum relative to said second value, said program also being adapted to compare said first value with a stored third value representative of a minimum and to replace said stored third value with said first value if said first value represents a minimum relative to said third value, said program being further adapted to store a fourth value representative of the time at which said first value that replaced said second stored value was acquired by said measurement means, and to store a fifth value representative of the time at which said first value that replaced said third stored value was acquired by said measurement means; and alert means, said alert means being responsive to a signal supplied by said microprocessor means for indicating that said second value has been replaced with said first value and for indicating that said third value has been replaced with said first value, wherein said program is adapted to direct said microprocessor means to supply a signal to said alert means if said second value has been replaced with said first value or if said third value has been replaced with said first value.
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]]> https://www.datamp.org/patents/displayPatent.php?id=85334&pn=42,296 PIPE WRENCH Patentee: Gustav Gunnarson - San Francisco CA Granted:1893-03-14

The size and position of the teeth on the three jaw faces is based on a formula such that tooth size increases as pipe diameter increases. The principle is shown applied to "hook jaw" and "pliers" type pipe wrenches. Corresponding U.S. patent 460,230 was granted Sept. 29, 1891.
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]]> https://www.datamp.org/patents/displayPatent.php?id=85333&pn=RE12,738 Pipe Wrench Patentee: Ebenezer Fisher - Philadelphia PA Granted:1906-01-23
Assigned to Fisher Wrench Co. - Egg Harbor NJ

Reissue of 773,933, a "girth grip" type pipe wrench with provisions for adapting grip to allow for small variations in pipe sizes or irregular surfaces. Secondary evidence shows Fisher Wrench Co. operated ca. 1903 - 1911, and likely produced a form of this "friction wrench." Corresponding Canadian patent CA-98,248 shows variant forms for some of the component parts.
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]]> https://www.datamp.org/patents/displayPatent.php?id=85332&pn=98,248 Pipe Wrench Patentee: Ebenezer Fisher - Philadelphia PA Granted:1906-03-27

"Girth grip" type pipe wrench with provisions to allow for self-adjustment to conform to small variations in size or surface irregularities in the pipe / tubular form gripped." Some structural details differ from forms shown in corresponding U.S. patents 773,933 and RE12,738.
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]]> https://www.datamp.org/patents/displayPatent.php?id=85331&pn=773,933 WRENCH Patentee: Ebenezer Fisher - Philadelphia PA Granted:1904-11-01
Manufactured by Fisher Wrench Co. - Egg Harbor NJ
Assigned to Fisher Wrench Co. - Egg Harbor NJ

"Girth grip" type structure with provisions for self-adjustment to compensate for irregular surfaces and small variations in size of pipe or similar round objects. Fisher Wrench Co. was founded in 1903, and is recorded as "default" in 1911. A 1906 New Jersey Industrial Directory lists the company with 10 employees. This design probably was produced for some time during that interval. Corresponding Canadian patent CA-98,248 published March 27, 1906 shows slightly different shapes for some of the component parts. Reissue patent RE12,438 has extra figures in the drawing and corresponding alterations in specifications and claims.
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