Inventor

JOHNSTON CHARLES J

US33 patents

⚠️ This page may combine multiple inventors who share the name “JOHNSTON CHARLES J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

JOHNSTON CHARLES J

EVERETT CHARLES TECH

Test fixture alignment system for printed circuit boards

One-piece compliant probe

Test fixture alignment system

Testing of integrated circuit devices on loaded printed circuit

Test fixture

Test module hanger for test fixtures

Twisting electrical test probe with controlled pointing accuracy

Testing of integrated circuit devices on loaded printed circuit boards

Test fixture with adjustable bearings and optical alignment system

ESD protection for universal grid type test fixtures

Dual side access test fixture

Vacuum test fixture for printed circuit boards

CAPITAL FORMATION INC

Self-closing spring probe

Solid spring electrical contacts for electrical connectors and probes

Test socket

Spring contact assembly

Self-retained spring probe

Biased BGA contactor probe tip

Test socket

Coaxial tilt pin fixture for testing high frequency circuit boards

Test probe plunger tip

EVERETT CHARLES CONTACT PROD

Integrated circuit carrier having built-in circuit verification

Testing of integrated circuit devices on loaded printed circuit boards

Electrical test probe having rotational control of the probe shaft

Repetitive-switching

Optical fiber test probe having a sleeve-like plunger movable in a barrel

Quick termination apparatus and method for electrical connector

JOHNSTON CHARLES J

Spring contact assembly

Spring contact assembly

EVERETT CHARLES TECH INC

Coaxial test probe

Coaxial test probe with quadrature ground provision

SWART MARK A

Flat plunger round barrel test probe

DELWARE CAPITAL FORMATION INC

Hollow plunger test probe