Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Masking of holes in circuit patterns on circuit boards prior to flow soldering

Masking of holes in circuit patterns on circuit boards prior to flow soldering

US Patent 4638116 · Granted Jan 20, 1987

Estimated economic value: $25,390,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Telephone base with a display unit1993
Pushbutton and carrying member combination for operating an electronic switching1992
Telephone base members and support members1992
Telephone base structures for stabilizing upon support surfaces1992
Telephone handset having housings assembled without mechanical fasteners1988
Telephone handset for use in noisy locations1988
Low profile circuit board mounted telephone jack1988
Transmitter assembly for a telephone handset1986
Dynamic telephone receiver with magnetic shunt1985
Electret microphone shield1984
Adjustment of operating characteristics of a telephone transmitter including an 1983
Electret microphone with simplified electrical connections by printed circuit bo1980